BLU2216 Bluelab Soil ph Pen $ BLU2300E C & F NEW FEATURES! BLU2210 Bluelab ph Pen $112.50

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1 Bluelab Combo Meter The Bluelab Combo Meter is a conductivity, ph and meter all-in-one. It comes with a ph probe and conductivity and probe, that when placed into the solution, displays the selected reading on screen. Portable and does not require a power supply. Conductivity and do not need to be calibrated. Select display options for C or F and EC, CF or ppm. BLU7000 BLU2300E Bluelab Combo Meter $ BLU24102 Bluelab ph Probe BLU7000 Bluelab Carry Case $25.00 Bluelab Truncheons The world s favorite conductivity meter has just got even better! Bluelab s EC and Commercial Truncheons now feature easier to read scales, external thermistor for faster readings, new blue daylight readable LEDs, and easier cleaning just twist to remove shroud. Tough and reliable. Bluelab Truncheon Nutrient Meter Simply brilliant, brilliantly simple! With EC, CF, ppm 700 and ppm 500 scales to measure the strength of your nutrient solution. Bluelab Commercial Truncheon When range, durability and accuracy counts! With a conductivity range right up to 6.0 EC (60 CF, 3000 ppm 500 and 4200 ppm 700), it will never leave you short. Bluelab Guardian Monitor Measures all 3 critical parameters for successful growth: ph, conductivity AND. The Bluelab Guardian Monitor is a constant indicator of the desired levels of EC/ppm 700/ TDS/CF, ph and, enabling the grower to optimize these parameters through each growing phase. Monitor your crops 24 hours a day, with flashing high and low alarms allowing you to make adjustments to your solution quickly. BLU27100 Bluelab Guardian Monitor $ Bluelab ph Meter When measuring the ph of a solution is important... reach for the Bluelab ph Meter. Simply place the ph probe into the solution and the reading is displayed on the screen. This lightweight, portable meter runs on 2 AAA batteries no power supply needed to operate. BLU2300E New label to come product may look different than shown. NEW FEATURES! BLU2000E EC Truncheon $ BLU2100E Commercial Truncheon Replaceable double junction ph probe Auto off function Simple push button ph calibration Low battery indicator Large, easy to read display 13mm (1/2") BLU2320E BLU2320E Bluelab ph Meter $ BLU2330E Bluelab Soil ph Meter $ BLU24115 Bluelab Soil ph Probe Bluelab Soil ph Pen Provides a ph and reading of soils and media, so you know the right nutrients will be made available to your plants. It will even measure solutions... Now, isn t that handy? Features a sturdy and removable dibber to create a hole in soils and media, ph probe to measure ph or of soils, media, and solutions, and easy-to-use buttons with selectable units for oc and of. Has a backlit LCD display, successful ph calibration indicator, hold and auto off functions, and a low battery warning. BLU2216 Bluelab Soil ph Pen $ bluelab ph pen The Bluelab ph Pen provides a compact, quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients. Teamed with our Bluelab EC Pen or Bluelab ppm Pen, you have a handy, convenient and accurate system for ensuring optimum plant growth and health. The Bluelab pen range has been specially developed as an affordable and effective option for hobby or small scale growers. Measures ph and Selectable units for C & F Backlit LCD display BLU2210 Bluelab ph Pen $ bluelab ppm pen The latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity. Bluelab Conductivity Pens measure how much food the plant has available. Team it up with Bluelab's ph Pen for a handy, convenient and accurate system for ensuring optimum plant growth and health. The Bluelab ph Pen and Conductivity Pen range has been specially developed as an affordable and effective option for hobby or small scale growers. Measures conductivity and Selectable units for conductivity and Double junction probe (not replaceable) Successful calibration indicator Hold reading function Backlit LCD display Calibration optional Successful calibration indicator Hold reading function Low battery indicator Low battery indicator Fully waterproof Auto off function Automatic compensation Fully waterproof Auto off function Automatic compensation BLU2221 Bluelab PPM Pen $94.00 Bluelab Probe Care Kits & Solutions Probe care is an important part of maintaining accurate readings. Bluelab s Probe Care Kits provide all the tools you need, including handy tips! Bluelab solutions are manufactured for Bluelab products and are referenced to high laboratory standards. HDPHCLCCAL Bluelab Probe Care Kit ph $30.00 HDNUTPRCLC Bluelab Probe Care Kit Conductivity HD4CAL ml Cal Solution $7.78 HD4CAL ml Cal Solution HD7CAL ml Cal Solution 7.78 HD7CAL ml Cal Solution hydrofarm.com 201

2 Gro CHEK EC & TDS Meters Continuous reading meters from Hanna Instruments display ph & EC. Protective housing made to last with easy to read large LCD. HI983302N Gro CHEKpH/EC/TDS Meters Hanna offers you a fast response probe that is simple to use and has automatic compensation. With or without cal-check feature. HI12855 replacement electrode for the Gro Chek series 5 model HI9813-5N. HI983301N Gro Chek TDS Monitor w/h $ HI983302N Gro Chek EC Monitor w/h Combo ph/orp/ Temperature Tester This waterproof meter measures ph, ORP and and it floats! Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement. Features HANNA s exclusive cartridge ph and ORP electrode, extendable cloth ph junction, Automatic Temperature Compensation, automatic calibration, battery % Level at startup and stability indicator, and HOLD function. HI98121 Combo ph/orp/temperature Tester $ Gro CHEK ph & TDS Combo Amazing continuous reading meter from Hanna Instruments displays ph & EC simultaneously. It takes up very little space and has adjustable set points. HI9813-5N Gro Chek ph/ec/tds Meter $ HI9813-6N Gro Chek ph/ec/tds C Meter w/cal-check feature HI Gro Chek Replacement Probe for H HI Gro Chek Replacement Probe for H HI12855 Gro Chek Replacement Probe for HI9813-5N Gro CHEK Combo Temp Tester The HI & Combo waterproof tester offers high accuracy ph, EC/TDS and measurements in a single tester. The waterproof Combo (it even floats) has a large easy-to-read, dual-level LCD and automatic shut-off. ph and EC/ TDS readings are automatically compensated for the effects of (ATC). This tester has a replaceable ph electrode with an extendable cloth junction, and an EC/TDS graphite electrode that resists contamination by salts and other substances. HI98129 Gro Chek ph/ec/tds/c /PPM Tester $ HI98130 Gro Chek Hanna ph/ec/tds C /PPT Pocket Tester HI73127 Replacement ph Electrode for HI98127/28/29/ Gro CHEK Combo Temp Tester This meter is waterproof and comes in rugged, protective housing with large, easy to read LCD. HI981404N Gro Chek ph Tester $ HI981401N Gro CHEK ph Indicator w/electrode $ HI1286 ph Electrode w/2m 6.6' Cable hydrofarm.com

3 Gro CHEK ph/ec/ TDS 3-Way Meter A 3-in-1 continuous reading meter from Hanna Instruments. Completely waterproof with a backlit dual level LCD, Auto Cal & ph Temperature Comp. HI Gro Chek ph/ec/tds Temp Cont. Combo $ Gro CHEK Dist 5 Waterproof 3-Way Temp Tester The DiST5 includes features such as a replaceable graphite electrode, adjustable TDS ratio, in C or F, automatic compensation (ATC) with adjustable coefficient ß, battery level indicator, stability indicator, automatic shut-off and automatic calibrating all in a floating, waterproof casing. HI98311 DiST 5 EC/TDS Meter $ Gro CHEK phep 4 Waterproof ph Temperature Tester The phep 4 includes features such as a dual-level LCD, battery level indicator, replaceable ph electrode cartridge, instability indicator, automatic shut-off and automatic calibrating all in a floating, waterproof casing. HI98127 Hanna phep 4 Meter $ HI73127 Replacement ph Electrode for HI98127/28/29/ Gro CHEK ph, TDS & EC Stick Testers Sturdy and waterproof. It also floats so that it can be quickly retrieved if accidentally dropped in the tank. The meter will run for 2000 hours continuously on common AA-type batteries (included). Calibration has been simplified to one-point through dial on the front of the meter. The outer casing also incorporates a molded eye so you can hang the meter when not in use. HI Gro Chek ph Stick Tester $ HI Gro Chek TDS Stick Tester HI Gro Chek EC Stick Tester phep Tester The standard in ph measurement with ±0.1 ph accuracy, has two point calibration, large LCD with pull-out replenishable junction and 700 hour battery life. Ergonomically designed, with rugged housing to fit your hand. Use the protective cap as a measurement container. The electrode is replaceable and has a non-clogging fiber junction for longer life. Calibrates on 7.0 and 4.0 solutions. Primo Tester & Solutions The Primo TDS tester provides a fast and dependable way to measure the total dissolved solids (TDS) in your water samples. It is ideally suited for the rigorous demands of water quality professionals, who will appreciate the practicality of Primo s easyto-read LCD when demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure the readings are consistent to the standard or reference. Primo TDS uses a single button at the top of the meter. Press it once and the meter is powered and ready for use. Press and hold the button for a few seconds and Primo automatically enters calibration mode. Simply open a sachet of the calibration solution, dip the probe and within seconds the meter recognizes the calibration solution and calibrates itself! Maximum battery life is managed by Primo s powerful microprocessor, which automatically turns it off after 5 minutes of inactivity. HIPRIMO ITEM CODE DESCRIPTION SIZE SRP HI98103 Checker ph1 Tester N/A $40.95 HIPRIMO Primo TDS Tester N/A HI7004L ph4 Calibration Solution 16 oz HI7007L ph7 Calibration Solution 16 oz HI70442M 1500 PPM Solution 230ml HI7031M 1413mS/cm Solution 230ml HI70300L Storage Solution 16 oz. 500ml HI7061L Electrode Cleaner 16 oz. 500ml HI70442P 1500PPM@25 C 20 ml Calibration Sol. 25-pk HI70004P ph 4.01 Calibration Sol. 20 ml pk HI70007P ph 701 Calibration Sol. 20 ml pk HI70030P µ S/cm Calibration 20 ml Sol. 25-pk HI70031P 1413 µ S/cm(EC) 20 ml Calibration Sol. 25-pk HI70032P 1382 PPM@25 C Calibration Sol. 25-pk 20 ml Champ ph Tester A rugged ph meter with single point calibration and a battery life of over one full year even when used for one hour a day! Large easy to read LCD. Use the protective cap as a measurement container or storage device. The electrode is replaceable and has a non-clogging fiber junction for longer life. HI98106 Champ ph Tester $62.95 HI98107 phep Tester $66.95 hydrofarm.com 203

4 Replacement sensors at Hydrofarm.com AquaPro TDS/Temp Meter Measures total dissolved solids (TDS) and. Features Automatic Temperature Compensation (ATC) in a water-resistant housing. It measures from ppm, has digital calibration (push button), auto-off function, data-hold function and low-battery indicator. Large, easy-to-read display with simultaneous reading. The AquaPro is calibrated with a 342 ppm NaCl solution. Can be recalibrated with digital calibration using the push buttons, rather than a screwdriver. Includes cap and batteries. HM Meter This handheld/portable ph tester is perfect for both consumer or commercial use. It measures both ph (0-14) and (0-80 C; F). The PH-200 meter is three-point factory calibrated to 4, 7, and 10 ph. The meter can be recalibrated with digital calibration using the push buttons. It is accurate to +/ ph. Comes with cap, batteries, and lanyard. HMDPH200 Waterproof ph Temperature Meter $99.95 HMDAP1 Aqua TDS/Temperature Meter $42.95 TDS-3 Handheld TDS Meter Ideal for commercial use, the TDS-3 includes a carrying case with belt clip. It is highly efficient and accurate due to its advanced microprocessor technology. It features a measurement range of ppm. From ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking image. Calibration Solution NaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner. HMDC ppm Calibration Solution $6.50 HMDTDS3 TDS3 Tester Pen $37.00 COM-100 Waterproof Combo Meter Measures electrical conductivity (EC), total dissolved solids (TDS) and. Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor, and automatic compensation (ATC) using three coefficients. Measurement range: µs; ppm (auto-ranging). HMDCOM100 EC/TDS Temperature Meter $76.95 COM-80 Water Resistant EC/TDS Meter Measures EC, TDS and in ºC/ºF. Features a durable, water-resistant housing, automatic compensation, hold button, auto shut-off, digital (push button) calibration, low battery indicator, and a large, easy to read LCD display. Measures from µs / PPM, with a range of 0-80 C; F. Uses one 3V button cell battery (included). HMDCOM80 EC/TDS Temp Water Resistant EC/TDS Meter $47.95 hydroponic ComboMeter ph/ec/tds The Hydroponic Combometer can be used anytime and anywhere to help you manage your crops daily nutrient requirements. Calibration of the ph and EC/TDS is very easy using the push buttons on the meter and calibration solutions. The Combometer offers the added benefit of being able to select the display options for as ºC or ºF and nutrient solution as EC/TDS. Measures ph, nutrient strength and Displays in ºC or ºF Two display options for nutrient: EC/TDS Easy push button calibrations Auto turn-off function Factory calibrated ESEPT1 Hydroponic Combometer ph/ec/tds $ hydrofarm.com

5 milwaukee waterproof ph tester With a range of -2.0 to 16.0 ph at 0.1 ph resolution, this tetster is accurate to ± 0.1 ph. Features ATC automatic, calibration 2 points - automatic, with auto-off after 8 minutes of non-use. User select 6 buffer types. Environment 32 to 122F (0 to 50 C). Display LED & push to hold. Battery life 300 hours of use. Battery type 1.5v button - 4 included. Unit is labeled "Martini Instruments" (a laboratory equipment division of Milwaukee Instruments). MIPH55 Milwaukee Waterproof ph Tester $82.95 MIPH55PROBE ph/temp Probe for ph55 and ph smart 3-in-1 meter with ph/ec/tds Smart 3-in-1 meter now has a faster processor, a 100% larger LED display, and the convenience of a single probe to measure ph, conductivity and TDS. Also features Automatic Temperature Compensation. Easy to calibrate. Simple and ready to use right out of the box. Comes with calibration solution, mounting bracket and 9v alkaline battery. (Replaces MISM802) MIMW802 Milwaukee 3 Function MW802 $ MIMA850 MA 850 Replacement Probe for MW801/ MW100 Portable ph Hand Meter This smart ph meter is a low cost portable meter with a very fast and accurate processor. Unit comes with detachable probe, 9v battery and calibration solution. ph METER w/atc Highly accurate, portable and now faster than ever with a new chipset and motherboard, the MW102 features a double junction electrode with 1 meter cable, automatic calibration and a new, larger and easier to read LED display. Includes 9v alkaline battery. ph MonitoR with Hi-Lo User Select Alarm This ph Monitor as a range of 0.0 to 14.0, with 2-point manual calibration and accuracy of ±0.2 ph. Set point range is 3.5 to 7.5 ph. LED Visual Alarm Active when reading is higher or lower (user select) than the set point. Comes with 12 V DC Power Adapter, MA911B/2 Double Junction ph Probe, 20 ml. ph 7.01 Calibration Solution and screwdriver for calibration. Also includes mounting kit and probe holder. MISM101 Milwaukee ph Hand Meter MW100 ±.2 $ MIMA911B2 Milwaukee Double Junction ph Electrode SM101 Replacement MIMC110 Milwaukee ph Monitor $ PORTABLE 4-IN-1 ph/ec/tds/temp METER Measures ph, conductivity, total disolved solids and with one rugged, multi-parameter probe. Select from a range of both calibration buffers, and the scale ( C or F) can be selected. Measures different TDS factors and coefficients for greater consistency and reproducibility. Other features include a stability indicator, auto-hold function, and large, easy-to-read LCD screen with simultaneous readings of ph and or EC/TDS and. Includes probe, 1 meter cable, 9V battery, carrying case and an assortment of calibration solutions. MI806 Portable 4-in-1 Meter $ digital brix refractometer Range 0-85% brix, resolution 0.1% With automatic compensation (ATC) Includes battery MIMA871 Milwaukee Digital Brix Refractometer $ Waterproof Testers Stainless steel probes deliver fast and accurate readings with ten times better resolution. Comes with protective case and calibration solution. MIT75 Milwaukee TDS T75 Tester Waterproof $76.95 MIT76 Milwaukee TDS T76 Tester Waterproof EC65 Waterproof Tester The EC65 is a microprocessor based conductivity tester with a rugged one-piece IP67 waterproof casing. Submersible up to the LCD! This instrument is a low-cost and easy-to-use meter with a replaceable electrode. Features Automatic Temperature Compensation, IP67 waterproof casing, replaceable electrode, and easy-to-read LCD. MIC65 EC65 Waterproof Tester $80.95 Continuous Monitor/ Portable TDS meter This smart and simple TDS meter features manual calibration, faster processor, larger easy-to-read LED display, smaller & lighter ergonomic case design. Range TDS: mg/l (ppm). Resolution TDS: 1 mg/l (ppm). Accuracy TDS: 2% Full Scale. Calibration: 1 Point - Manual. Environment: 0-130F. Battery Type: 9v Alkaline - Included. MIBEM401 Continuous Monitor/Portable TDS Meter $ hydrofarm.com 205

6 Milwaukee TDS - PPM Monitor TDS - PPM Meter, Range: ppm 1 Point Manual Calibration, Accuracy at 1 PPM, Supplied with MA811D/1 TDS Probe, 110 Volt Power Supply, Unit Mounting Kit, Probe Holder, a 20 ml ppm Sachet Calibration Solution and Screwdriver for Calibration. May be used as a stationary 24/7 monitor or portable TDS meter. MIMC410 Milwaukee TDS - PPM Monitor $ Smart 3 in 1 ph/ec/tds Continuous Monitor/ Portable meter Uniquely designed to serve as both a continuous combo monitor and portable combo meter. Range: ph, ppm, mS/cm, Accuracy ±0.20 ph and ± 2% Full Scale for EC & TDS. Comes with SE600 Combo Probe, 110 Volt Power Supply, 9 volt battery, Unit Mounting Kit, 20ml Sachet of Calibration Solution of ph 7.01, 1500 ppm and 1413µS/cm. MIBEM802 Smart 3-in-1 Continuous Monitor/Portable $ Meter Continuous Monitor/ Portable ph meter ph Meter, Range 0.00 to ph, With 2 Point Manual Calibration, Manual Temperature Compensation, ±0.02 ph Accuracy, comes with a SE220 Double Junction ph probe, 110 Volt Power Supply, & 9volt battery, With Unit Mounting Kit, Probe Holder, 20 ml. ph 7.01 & 4.01 Sachet Calibration Solution & Screwdriver for Calibration -- Uniquely Designed to serve as both a continuous ph Monitor and portable ph meter. MIBEM101 Continuous Monitor/Portable ph Meter $ ph Tester w/1 Point Manual Cal This ph Tester features 1 point manual calibration and comes with a 30-day warranty, snap-over protective case, 7.01 calibration solution, and calibration screwdriver., ± 0.2 ph Accuracy range: 0.0pH to 14.0 ph Full Range tester. MIPH600BX ph Tester w/1-point Manual Cal $34.95 Milwaukee Replacement Probes double junction ph probe for mw100 (Item #MISE220) For all MW and old style SM ph units replaces the old MA911B/1. Includes 1 meter cable and gel filled electrolyte solution. replacement probe for mw802 (Item #MISE600) For new style MW801 / MW802 units only. MISE220 Milwaukee Double Junction ph Probe for MW100 $56.95 MISE600 Milwaukee Replacement Probe for MW ph tester w/1 point manual calibration ± 0.2 ph accuracy range: 0.0 to 14.0 ph. 700 hours battery life 30-day warranty Use calibration solution M10007P ph 7.01 (not included) MIPH600 Milwaukee ph Tester w.1 Point Manual Calibration $33.95 AG900 Kit Milwaukee Instruments AG900 provides instant readings of the three most important factors in efficient plant production: ph, EC, and TDS. The AG900 kit comes with an MW802 hand held microprocessor, calibration solution, measuring cup for soil testing, a comprehensive 21-page operational and testing manual, 9v battery as well as a protective carrying case. For soil and tank measurement of ph-ec-tds. MISE220 MIAG900 Milwaukee ph - EC - TDS KIT $ Standard Calibration Solutions Available in 220ml bottles and 20ml sachets. Traditional buffer solutions are packed in 220ml leak-proof bottles and are recommended for lab application. Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open, insert the tester or electrode into the sachet and calibrate. Sachets are sold in boxes of 25 pieces. MISE600 MI10032P 1382 TDS Solution 20ml $1.00 MI10442P 1500 ppm Sachet 1.00 MI10004P PH4 Solution 20ml Sachet 1.00 MI10007P PH7 Solution 20ml Sachet 1.00 MIMA9004 PH4 Solution 220ml Bottle MIMA9007 PH7 Solution 220ml Bottle MIMA ppm Solution 220 ml hydrofarm.com

7 MYRON L ULTRApen The Ultrapen TDS/Conductivity/Salinity pocket pen offers the accuracy of benchtop lab equipment in an affordable, portable, compact pen. Extremely accurate, fast and versatile for use in diverse water quality applications, the Ultrapen is easy to calibrate and easy to use. Just press a button then dip the pen in solution; results display in seconds. Comes with convenient holster Specially designed with measurement ranges and solution modes to meet the water quality testing needs of many applications Accuracy of ±1% of reading ±.2% at calibration point Proprietary compensation, TDS conversion algorithms, and autoranging Highly stable microprocessor-based circuitry Rugged, reliable, shock-resistant fully encapsulated electronics, body constructed of aircraft aluminum Waterproof housing True one-handed operation with simple one-button function High capacity N-type battery included The Nutradip Tri-meter Combines the technology of the ph and TDS meters and addresses an additional key factor in hydroponic growing, the. Temperature in a nutrient solution is often wrongly overlooked. The variance in a growing operation can significantly restrict the growth and yield of the plant(s). With no effort at all, continuous reading of TDS, ph, and can simultaneously be monitored and correct levels can easily and reliably be maintained. ND Nutradip Continuous Tri Meter (ph, PPM & Temp) $ ND Nutradip Continuous Tri Meter (ph, EC & Temp) ND Probe ph Electrode JLPT1 Myron L Ultrapen $ MYRON L SOLUTION Myron L 442 Standard TDS Calibration Solution is the best choice when measuring city water supply, wells, boiler and cooling water samples, etc. 442 refers to the combination of salts mixed with deionized water to comprise this standard: 40% sodium sulfate, 40% sodium bicarbonate, 20% sodium chloride. A combination of standard salts is necessary since natural water salt type and concentration can vary greatly by location. JL Q Myron L TDS Calibration Solution, 1L, 16/cs $28.95 Tri Calibration Kit Nutradip Calibration solutions are now available in this convenient tripack and are compatible with all popular scales and meters. Kit includes Nutradip ph4 Calibration Solution, Nutradip ph7 Calibration Solution, and Nutradip EC ppm Calibration Solution. ND Tri Calibration Kit $21.33 Nutradip AC/DC Combo Meters These continuous monitoring meters feature automatic compensation, with high quality probes and AC/DC power built in for portability. Engineered for accuracy and durability, they are light weight, splash resistant and have an easy-to-read display. Wall mount or hand held. Includes replaceable 9 volt battery and calibration solution. Batteries for ph/tds PEN These 1.4V batteries are compatible with most digital pens. HGPROBAT Batteries for ph/tds pen, 4/pk $6.95 ND Nutradip PPM AC/DC Combo Meter $99.95 ND Nutradip ph AC/DC Combo Meter hydrofarm.com 207

8 Oakton Waterproof Ecotestrs Checking ph levels once a day might not be enough to prevent a serious problem in your water quality application. These ph meters feature a large display that lets you check your ph levels at a glance so you can optimize ph and nutrient strength during growth, flowering, and fruiting. OK OK OK Oakton Waterproof Ecotestr ph1, w/one Point $71.95 Calibration OK Oakton Waterproof Ecotestr ph2, w/auto Temp Compensation & Up to 3 Point Calibration Double Junction ph Testrs High ±0.01 ph accuracy in a waterproof pocketsized instrument. Features a double junction electrode ideal for dirty water and solutions with heavy metals or other contaminants. ATC* : Automatic Temperature Compensation OK OK OK OK Oakton ph Testr ph Accuracy ATC* $ OK Oakton ph Testr ph Accuracy ATC* OK Oakton ph Testr ph Accuracy ATC* OK Oakton Replacement Sensor for ph Testr 10/20/ Eco Testrs - TDS High & Low New economical conductivity and TDS pocket meters feature a large, ergonomically designed display so that you can easily view measurements at a glance. The orientation of the display means there s no need to turn your head or tilt the tester. Waterproof and dustproof housing is designed for use in dirty and damp field conditions. Convenient, built-in belt/pocket clip keeps the tester accessible when not in use. OK OK OK Eco Testr TDS Low 0 to 1990 ppm $84.95 OK Eco Testr TDS High 0 to 10.0 ppt Latest Hydrofarm.com TDSTestrs Check nutrient concentration and with one simple test. All the features of the TDS and more in a single instrument! Analyze hydroponic solutions using either cup-style or dip-style measurements. Cup-style is ideal for small volumes, samples from valves, or when it is impractical to use dip-style sensors. OK OK Oakton Waterproof TDS Testr 11 $ OK Oakton Waterproof TDS Testr ppm/±1% FS OK Oakton Replacement Electrode for 11 Series Waterproof Dual Parameter Testrs Two important measurements in one instrument. The PCTestr tests conductivity and ph while the PTTestr tests TDS and ph. They feature easy-to-read displays, push-button calibration, HOLD function, and error messages. Valox housing and stainless steel electrodes offer good chemical compatibility and durability, and are designed to float. All waterproof Testrs have replaceable sensors. OK OK OK Waterproof PCTestr 35 (ph/conductivity) $ OK Waterproof PTTestr 35 (ph/tds) OK Replacement Sensor calibration solutions Oakton buffers for meters with 0.01 resolution are standardized against NIST-certified ph references within 0.01 ph at 77 F (25 C). Store buffers away from direct sunlight. OK ph Calibration Solution, 500 ml $21.50 OK ph Calibration Sol. (20 pouches/bx) OK ph Calibration Solution, 500 ml $21.50 OK TDS Calibration Solution, 500 ml hydrofarm.com

9 ph Up & ph Down ph Adjusting Solutions To maximize plant growth, the ph content of your nutrients should be slightly acidic. Experienced growers consider the ideal ph for most crops to fall between 5.5 and 6.5. When the ph of the nutrient is not ideal, use the ph Up & Down Adjusting Solutions. For example, acid content can reach unacceptable levels when nutrient solutions are mixed with poor quality water or ph unstable media such as when rockwool and gravel products are used, or when high plant growth rates destabilize the nutrient mix due to rapid nutrient absorption by the crop. ph Up Liquid GH1521 ph Up Base, 8 oz $7.54 GH1522 ph Up Base, 1 qt GH1523 ph Up Base, 1 gal ph Down Liquid GH1531 ph Down Acid, 8 oz $7.54 GH1532 ph Down Acid, 1 qt GH1533 ph Down Acid, 1 gal ph Up Dry CONCENTRATE GH1525 ph Up Dry Base, 1.5 lbs $15.00 GH1527 ph Up Dry Base, 16 lbs PH DOWN DRY CONCENTRATE GH1535 ph Down Dry Acid, 1.5 lbs $10.76 GH1537 ph Down Dry Acid, 16 lbs Calibration Solutions General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use these reference solutions widely among many popular brands of meters using the NaCl scale. Technicians check each batch to ensure that these solutions are exactly calibrated for each and every time they are used. GH1541 ph 4.01 Calibration Solution, 8oz $7.54 GH1542 ph 4.01 Calibration Solution, 1 qt GH1551 ph 7.0 Calibration Solution, 8 oz $7.54 GH1552 ph 7.0 Calibration Solution, 1 qt GH ppm Calibration Solution, 8 oz $8.20 GH ppm Calibration Solution, 1 qt ph Test Indicator Simply fill a test-tube halfway with nutrient, add a few drops of ph Test Indicator, and observe the coloration of the liquid in the test vial. Many experienced growers prefer this ph Test Kit to expensive electronic meters because of its reliability and ease of use. GH1514 ph Control Kit $17.20 GH1515 ph Test Kit, 1 oz 7.54 GH1516 ph Test Indicator, 8 oz earth juice double UP TM & DOUBLE DOWN TM The "best choice" for liquid ph adjusters. Proprietary formulation that offers superior ph control. HOH81101 Double Up, 1 qt $11.56 HOH81201 Double Up, 1 gal HOH85101 Double Down, 1 qt $11.56 HOH85201 Double Down, 1 gal Earth Juice Natural Up & Natural Down These ph adjusting crystals will, once and for all, eliminate the hassles and worries of spilling, splashing and dealing with harsh liquid ph adjusters. Use to adjust the ph of fertilizer and plant micronutrient foliar solutions. HOH81511 Earth Juice Natural Up, 1 lbs. $10.24 HOH81512 Earth Juice Natural Up, 2 lbs HOH84033 Earth Juice Natural Up, 10 lbs HOH84034 Earth Juice Natural Up, 30 lbs HOH84021 Earth Juice Natural Down, 0.8 lbs $9.10 HOH84022 Earth Juice Natural Down, 1.6 lbs HOH84023 Earth Juice Natural Down, 7.8 lbs HOH84024 Earth Juice Natural Down, 25 lbs Hydro RX Water & Soil Analysis Test Kit Takes the guess work out of water management. A kit that lets you manage your plant s nutrients with labtested precision. It s simple: just take a water or soil sample and send it back to Hydrofarm Test Lab in the enclosed mailing envelope, and within 2-4 days, you ll receive a detailed analysis of your plant s water. Test results are available online or by . HGLABTEST Hydro RX Testing w/hang Tag $39.95 hydrofarm.com 209

10 ph Up and ph Down EASY Control 25 Reformulated to a less concentrated 25% strength, so it s easier to use for novice growers less chance of over dosing. New lower price, too! These ph adjusters work by altering the ph of a solution. If the current ph is at 5 (slightly acidic) a solution of alkaline (ph UP) is added to raise the solution to the desired level. This also works in reverse. Note: Do not store ph Up and ph Down next to each other. 25% STRENGTH CONTROL EASY SAFE! & EASY Microbe Life ph UP & ph down When used as directed, Microbe Life ph Up and ph Down safely raise and lower ph levels without harming plants. Both products combine 2 ph adjusters for buffered effectiveness, and contain 3 electrolytes to help maintain osmotic balance. ML21398 ph Up, 16 oz $14.95 ML21399 ph Up, 32 oz ML21400 ph Up, gal ML21401 ph Up, 2.5 gal ML21402 ph Down, 16 oz $14.95 ML21403 ph Down, 32 oz ML21404 ph Down, gal ML21405 ph Down, 2.5 gal ESPHUPT ph Up, 1 pt $7.50 ESPHUQT ph Up, 1 qt ESPHUGAL ph Up, 1 gal ESPHDPT ph Down, 1 pt $7.50 ESPHDQT ph Down, 1 qt ESPHDGAL ph Down, 1 gal ph buffers and cf standard These ph buffers are a known solution of a certain ph value designed to test the accuracy of ph meters. Buffers use two values of 4 and 7pH to calibrate your ph testers as they are at the outer reaches of the range of ph where you work in hydroponics i.e escal84 Calibration 4.01, 8 oz $7.95 ESCALQT4 Calibration 4.01, 1 qt ESCAL87 Calibration 7.0, 8 oz $7.95 ESCALQT7 Calibration 7.0, 1 qt ph TEST KIT This ph test kit is good for 150 tests. At the rate of 3 tests per week it will last one year, making it excellent value for money. This kit covers a ph range of 3-10 measuring in 0.1 increments. (Wide Spectrum) Measures 3-10 ph. esphtest ph Test Kit $5.95 ph Up & ph Down Moderate and maintain optimum ph levels. Both ph-balancing aids are manufactured using the highestquality ingredients: potassium hydroxide to raise ph and nitric acid to lower ph. While ensuring stringent industry safety standards are met, Technaflora s ph Up and ph Down are potent and effective in small doses. TFPHU1L ph UP, 1 lt $13.42 TFPHU4L ph UP 4 lt TFPHU10L ph UP 10 lt TFPHD1L ph Down 1 lt $13.42 TFPHD4L ph Down 4 lt TFPHD10L ph Down 10 lt BotaniCARE ph UP & ph DOWN Control ph levels, minimize problems and maximize your plants full potential with Botanicare s ph Up and ph Down solutions. Botanicare s ph Up consists of a 29% concentrated Potassium Hydroxide solution that has an extremely low level of phytotoxicity and does not contain salts or chlorides. Botanicare s ph Down consists of a 29% concentrated Phosphoric Acid solution that rapidly lowers ph levels with its gentle, non-burning formula. BCNSPHHQT ph Up, 1 qt $11.95 BCNSPHHGAL ph Up 1 gal BCNSPHLQT ph Down, 1 qt $11.95 BCNSPHLGAL ph Down, 1 gal hydrofarm.com