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  • Hanna pH 7.01 Calibration Solution 20 ml

    Hanna® packet solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards. The 20 ml sachets are single-dose and are ready to use.
    SKU:
    716876

    Retail: $1.32

    Special Price $1.06

  • HM Digital HydroMaster HM-500

    HydroMaster Digital tester makes monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you can depend on. Continuous pH/EC/TDS/Temp monitor with rechargeable battery. Portable, wall mount or benchtop use. Tests pH at a range of 0 pH-14 pH, temperatures from 30°F-176°F, TDS from 0-9999 ppm and EC from 0-9999 μS. Stores up to 20 measurement readings, so you can monitor changes over time. LCD touch-type screen with auto backlighting. Includes a rechargeable lithium ion battery. Features an adjustable alarm that has a high and low set point. Automatically turns off after 5 minutes. Comes with wall mountable bracket, USB cable, 2 flotation disks, 1 EC/TDS conductivity sensor, 1 pH sensor, 1 packet each pH 4, pH 7, storage solution and 1000 ppm calibration solution.
    SKU:
    716147

    Retail: $359.00

    Special Price $260.00

  • Nutradip Grow Boss TDS Replacement Probe (SPECIAL ORDER ITEM - 2-4 WEEK LEAD TIME)

    The GrowBoss Nutrient probe does double duty. This probe measures TDS while auto sensing temperature when immersed in your nutrient solution, sending this data to the GrowBoss indicator. The GrowBoss Nutrient/Temperature probe has a 6 foot cord and connects easily to the GrowBoss indicator via a USB style connector. These probes are built tough and will last for many years.
    SKU:
    716368

    Retail: $62.95

    Special Price $50.36

  • HM Digital Replacement Probe for pH

    Measures pH and Temperature. Auto-ranging three point calibration with digital fine tuning. pH buffer 4 solution is in a sponge embedded in a clear cap. Measurement Range: 0-14 pH with a waterproof housing. Digital automatic calibration (one point), with digital fine tuning. Auto-off, data-hold functions and low-battery indicator. Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory calibrated with three-point calibration to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, no screwdriver needed. Includes a cap, batteries, lanyard and pH 7.0 buffer.
    SKU:
    716180

    Retail: $45.95

    Special Price $36.76

  • Essentials Calibration 8oz 7.0

    For the calibration of pH testers. Use in conjunction with pH Buffer 4.
    SKU:
    ESCAL87

    Retail: $12.11

    Special Price $7.55

  • Essentials Calibration Qt 4.01

    For the calibration of pH testers. Use in conjunction with pH Buffer 7.
    SKU:
    ESCALQT4

    Retail: $19.95

    Special Price $18.95

  • Essentials pH Down Qt case of 12

    Easy control 15% strength water stabilizer. Decreases pH of nutrient solution. ;
    SKU:
    ESPHDQT

    Retail: $129.96

    Special Price $84.46

  • Essentials pH Up Gal case of 4

    Easy control 15% strength water stabilizer. Increases pH of nutrient solution.
    SKU:
    ESPHUGAL

    Retail: $117.19

    Special Price $71.47

  • Hanna Grochek Replacement Probe for HI9813-5 & HI9813-5N

    This pH/EC/TDS/temperature probe probe features a fiber junction and gel electrolyte making it ideal for fertilizer solutions. It is a replacement electrode for the GroChek series -5" models: HI9813-5 & HI9813-5N and is designed for simplicity of use in taking pH mS/cm ppm and temperature in the °C scale measurements.The;meter the;probe supports is a;versatile water resistant multiparameter portable instrument specifically designed for agricultural applications such as hydroponics greenhouses farming and nurseries. It features a large LCD that clearly displays the parameter being measured as well as calibration instructions. Calibration is fast and easy with knobs located on the front panel of the instrument."
    SKU:
    HI12855

    Retail: $135.95

    Special Price $110.00

  • Essentials pH Up Qt case of 12

    Easy control 15% strength water stabilizer. Increases pH of nutrient solution.
    SKU:
    ESPHUQT

    Retail: $129.96

    Special Price $84.46

  • Essentials Calibration Qt 7.0

    For the calibration of pH testers. Use in conjunction with pH Buffer 4.
    SKU:
    ESCALQT7

    Retail: $19.95

    Special Price $18.95

  • One Bluelab pH 7.0 Calibration Solution 20ml Sachet

    Bluelab's 2.77EC Conductivity Solution, pH 7.0 and pH 4.0 Calibration Solutions are now available in 20ml sachets. pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). The 2.77EC Conductivity solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe. Calibration Solutions should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be stored with the lids securely tightened.
    SKU:
    732894

    Retail: $1.99

    Special Price $1.71

  • Hanna SPO EC/TDS Probe for HI981409 & HI981410

    EC/TDS Probe for HI981409 & HI981410 with DIN connector measures 24 cm (9.4) and can be used to mix the fertilizer solution. The meter switches off after five minutes of inactivity to save battery life. The outer casing also incorporates a molded eye so that the meter can be hung right where it is needed.Calibration with this meter is easy and completely automatic. Simply press and hold the on/off button for a few seconds and the meter will request the appropriate calibration solution. Place the probe in the solution and wait until it is calibrated. No extra buttons to push or dials to turn!The tester has been specifically designed to address the needs of operators in hydroponics greenhouses and nurseries.FeaturesLightweight -- it floatsWater resistantIdeal for mixing fertilizerAutomatic calibrationAutomatic temperature compensation"
    SKU:
    HI1220

    Retail: $69.95

    Special Price $60.00

  • Commercial Grade Combo pH/EC/TDS/Temp Meter

    Multi-range pH/EC/TDS and Temperature meter - 4-in-1 pH/EC/TDS/Temperature probe - The rugged MA851D/1 probe has been designed for heavy-duty applications (agriculture industrial etc.)RANGE:0.00 - 14.00 pH 0 - 3999 µS/cm 0 - 1999 ppm 0.0 - 60.0°C 32.0 - 140.0°FRESOLUTION:0.01 pH 1 µS/cm 1 ppm 0.1°C 0.1°FACCURACY± 0.01 pH ± 2% Full scale (for EC and TDS) ± 0.5°C ± 1°FTEMPERATURE COMPENSATION: Automatic from 0 to 60°C/from 32 to 140°FpH CALIBRATIONIn 1 or 2 points with automatic buffer recognitionEC CALIBRATIONAutomatic in 1 pointEC/TDS CONVERSION FACTORAdjustable from 0.45 to 1.00;
    SKU:
    MI805

    Retail: $429.95

    Special Price $338.37

  • Hanna Salinity (NaCI) Calibration solution 30g-l.(SPO 3-4 week)

    Salinity (NaCI) Calibration solution
    SKU:
    HI7081M

    Retail: $34.95

    Special Price $26.14

  • Hanna Replacement probe for HI9026 (SPO item takes 3-4 weeks to get)

    This replacement probe supports the combination pH electrode for field applications.The HI 9026 is an advanced pH/ORP meter specifically designed to provide affordable and very precise results under harsh industrial conditions. The meter features a backlit display for clear readings in the darkest environments.When calibration is complete the electrode condition is displayed which indicates that the electrode is working properly and when it needs to be cleaned or replaced.
    SKU:
    HI1230B

    Retail: $106.95

    Special Price $95.00

  • PH/Temperature Meter

    pH/temperature meter.
    SKU:
    HMDPHM80

    Retail: $62.95

    Special Price $47.10

  • Hanna pH Combo Electrode Glass Body (SPECIAL ORDER ITEM)

    pH Combo Electrode Glass Body - Refillable Temp.
    SKU:
    HI1292D

    Retail: $228.99

    Special Price $160.00

  • Hanna 12880 S/ cm conductivity solution

    This Hanna conductivity calibration solution is widely used to assure the proper performance of conductivity meters with a scale higher than 10 mS.cm. This solution is used mainly for industrial applications and is available in various sizes to better meet your specific application requirements.
    SKU:
    HI7030M

    Retail: $23.30

    Special Price $12.30

  • Hanna Electrolyte Solution (SPECIAL ORDER ITEM - 2-3 WEEKS LEAD TIME)

    Check your refillable electrolyte level before performing any measurements. If the level is low refill with the proper electrolyte solution to ensure the correct electrode performance. This simple maintenance helps guarantee the efficiency and precision of your refillable electrodes.These electrolyte solutions are also available in FDA-compliant bottles.;
    SKU:
    HI7071

    Retail: $78.99

    Special Price $71.09

  • TWO METERS - Bluelab pH Pen & Bluelab PPM Pen

    The Bluelab pH Pen is the latest innovation for hand held pH meters and is the ultimate handy solution for measuring pH. Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control. 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 pH Pen and conductivity pen range has been specially developed as an affordable and effective option for hobby or small scale growers. Features: Measures pH and temperature Selectable units for ˚C & ˚F Backlit LCD display Double junction probe (not replaceable) Successful calibration indicator Hold function Low battery warning Fully waterproof Auto off function Automatic temperature compensation The Bluelab conductivity pens are the latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity. Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control. The Bluelab Conductivity Pens measure how much food the plant has available. The Bluelab ppm pen provides a compact, quick and handy way to manage the success of your crops to ensure they have the nutrients they need. Teamed with Bluelab's pH Pen, you have 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. Features: Measures conductivity and temperature Selectable units for conductivity and temperature Backlit LCD display Calibration optional Successful calibration indicator Hold function Low battery warning Fully waterproof Auto off function Automatic temperature compensation
    SKU:
    BLU2221PHnPPMPENS

    Retail: $199.00

    Special Price $145.00

  • Bluelab pH Probe KCl Storage Solution 100 ML

    The Bluelab Calibration Solutions are a very necessary part of a growers toolbox. These solutions are manufactured specific to the calibration process and referenced to high laboratory standards by Bluelab. They are required for the calibration of pH meters, pH monitors and controllers. Regular cleaning and calibrating of pH measuring equipment ensures accurate readings. Bluelab's EC/CF equipment does not need calibrating, as they are all factory calibrated at Bluelab. The CF27.7 solution is used as a reference to ensure you have adequately cleaned the EC/CF probe.

    SKU:
    BLU1008

    Retail: $20.74

    Special Price $16.95

  • Botanicare PH Up Gallon

    With plants, nutrient availability can be affected by soil or solution pH. pH levels outside recommended ranges can lead to nutrient lockout and nutrient deficiencies resulting in stunted growth and poor appearance. Control pH levels, minimize problems and maximize your plants full potential with Botanicares pH Up and pH Down solutions. Botanicares 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.
    SKU:
    722185

    Retail: $29.50

    Special Price $23.00

  • Botanicare PH Down Gallon

    With plants, nutrient availability can be affected by soil or solution pH. pH levels outside recommended ranges can lead to nutrient lockout and nutrient deficiencies resulting in stunted growth and poor appearance. Control pH levels, minimize problems and maximize your plants full potential with Botanicares pH Up and pH Down solutions. Botanicares pH Down consists of a 29 percent concentrated Phosphoric Acid solution that rapidly lowers pH levels with its gentle, non-burning formula.
    SKU:
    722195

    Retail: $29.50

    Special Price $23.00

  • Botanicare PH Up Quart

    With plants, nutrient availability can be affected by soil or solution pH. pH levels outside recommended ranges can lead to nutrient lockout and nutrient deficiencies resulting in stunted growth and poor appearance. Control pH levels, minimize problems and maximize your plants full potential with Botanicares pH Up and pH Down solutions. Botanicares 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.
    SKU:
    722180

    Retail: $13.90

    Special Price $11.35

  • Botanicare PH Down Quart

    With plants, nutrient availability can be affected by soil or solution pH. pH levels outside recommended ranges can lead to nutrient lockout and nutrient deficiencies resulting in stunted growth and poor appearance. Control pH levels, minimize problems and maximize your plants full potential with Botanicares pH Up and pH Down solutions. Botanicares pH Down consists of a 29 percent concentrated Phosphoric Acid solution that rapidly lowers pH levels with its gentle, non-burning formula.
    SKU:
    722190

    Retail: $13.90

    Special Price $11.35

  • SOIL Stake PH Pen - Bluelab Soil pH Pen

    Bluelab soil pH Pen - get your hands on Bluelab's newest hand held meter.

    This clever Soil pH Pen will help you manage the success of soil grown crops. The Soil pH Pen provides a pH and temperature reading of soils and media, so you know the right nutrients will be made available to your plants. It will measure solutions also...

    SKU:
    BLU2216

    Retail: $185.00

    Special Price $133.20

  • Oakton WP TDS Tester 11

    Test nutrient concentration and check temperature with one testr. All the features of the TDS/ECTestrs and more. Analyze hydroponic solutions using either cup-style or dip-style measurements with a single instrument. Cup-style is ideal for small volumes samples from valves or when impractical to use dip-style sensors.
    SKU:
    OK3566210

    Retail: $119.95

    Special Price $87.32

  • Oakton Calibration Solution 15000 uS case of 20

    Oakton Calibration Solution 15000
    SKU:
    OK3565313

    Retail: $46.00

    Special Price $34.38

  • Nutrilife H2O2 29% Quart - Case of 12 (Can't Be shipped)

    A 29% liquid concentrate solution that adds oxygen to nutrient solutions through chemical compounds. This additive is excellent for cleaning hydroponic equipment materials and growing areas. ;
    SKU:
    NLHP1L

    Retail: $147.00

    Special Price $139.02