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  • Bluelab Commercial Truncheon Meter

    With a conductivity range right up to 6.0 EC (60 CF, 3000 ppm x 500 and 4200 ppm x 700), it will never leave you short. The Bluelab Commercial Truncheon® Nutrient Meter has been designed for hydroponic crops that require a higher than normal EC or ppm requirement during their growing cycle. Its super tough, fully waterproof, has no on/off buttons to worry about and does not need calibrating. EC (0.4 - 6.0), CF (4 - 60) and ppm scales (TDS and 700 scale). Auto sense on and off. Battery life minimum 1 year (or shelf life of battery). Meter length: 40.7cm or 16-1/32 in.
    SKU:
    716049

    Retail: $140.00

    Special Price $126.00

  • Mad Farmer Get Down 275 Gallon (SPECIAL ORDER)

    Mad Farmer™ Get Down™ is proudly made in the USA and is specifically designed to reduce the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Down™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Down™ contains three different pH acidifying agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749993

    Retail: $4,500.00

    Special Price $4,350.00

  • Bluelab Combo Plus Meter - Probe Included

    The Bluelab® Combo Meter Plus is an all-in-one, convenient portable solution for accurate measurement of pH, conductivity and temperature in nutrient solution. The battery-powered, lightweight unit can be used anywhere, anytime to measure critical parameters related to nutrient uptake in plants. The Bluelab® Leap™ pH probe also allows fast and accurate pH measurements direct from the rootzone in a wide range of growing media including soil, rockwool, coco coir and potting mixes - no more pH slurries or extraction mixes. The detachable Leap™ pH Probe has a toughened spear-tip for improved durability and is lightning fast in nutrient solution. Easy to read backlit screen for lowlight environments, and simple push button operation to view your chosen parameter. Probe cable length is 2 meters/6.5 ft.
    SKU:
    716437

    Retail: $349.00

    Special Price $315.00

  • Alchemist pH Down Non-Corrosive Quart

    Alchemist pH Down is comprised of very pure, food safe ingredients. This unique buffer is non-toxic, non-corrosive and non-hazardous making it like no other pH buffer on the market. Alchemist pH Down Non-Corrosive will not increase the conductivity of your nutrient solution or add any minerals. Because it won't add any nutritional value, pH Down will not cause imbalances to your fertilizer formula like traditional buffers. Quickly and easily adjust any feed solution to the right range to help maximize nutrient availability. Very concentrated formula that is a great alternative to harsh mineral acids. This formula is biodegradable.
    SKU:
    722100

    Retail: $18.99

    Special Price $14.36

  • Mad Farmer Get Down 6 Gallon

    Mad Farmer™ Get Down™ is proudly made in the USA and is specifically designed to reduce the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Down™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Down™ contains three different pH acidifying agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749990

    Retail: $159.99

    Special Price $127.99

  • Mad Farmer Get Down 2.5 Gallon

    Mad Farmer™ Get Down™ is proudly made in the USA and is specifically designed to reduce the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Down™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Down™ contains three different pH acidifying agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749989

    Retail: $69.99

    Special Price $55.99

  • Mad Farmer Get Up 6 Gallon

    The Mad Farmer's Get Up™ is proudly made in the USA and is specifically designed to raise the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Up™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Up™ contains three different pH alkalizing agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749983

    Retail: $159.99

    Special Price $127.99

  • Mad Farmer Get Up 2.5 Gallon

    The Mad Farmer's Get Up™ is proudly made in the USA and is specifically designed to raise the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Up™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Up™ contains three different pH alkalizing agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749982

    Retail: $69.99

    Special Price $55.99

  • Mad Farmer pH Control Kit

    The Mad Farmer's pH Control kit includes an 8 oz Get Up, an 8 oz Get Down and 1oz of Mad Farmer’s Test Indicator Solution.
    SKU:
    749979

    Retail: $16.99

    Special Price $13.59

  • Luster Leaf Rapitest Water Check, 3 Pack

    Water Check instantly tells when plants need watering; stick will darken when plant has proper moisture and lighten when plants need more water. Includes 3 sticks.
    SKU:
    WC803
    $2.99
  • Luster Leaf Rapitest Soil Tester

    The Rapitest Soil Tester comes complete with five individual testing vials: two each for pH and one each for nitrogen, phosphorus and potash. Test results are compared to the included printed color chart.
    SKU:
    RTS800
    $5.99
  • Luster Leaf Rapitest Moisture Meter

    Ideal for indoor use, the Rapitest® Moisture Meter instantly indicates when plants need watering. This meter takes readings at the root level for the most accurate results. Includes moisture level recommendations for over 150 garden plants. No batteries required.
    SKU:
    RMM800
    $14.99
  • Sure Test Pro pH Pen w/ Replaceable Probe +/- 0.05 ATC

    The Sure Test® Pro pH Pen has a replaceable pH probe (716396) and a larger display than other Sure Test® pH pens. Reads both pH and temperature (F° or C°) with automatic temperature compensation (ATC) for more reliable pH measurements. Features a pH resolution of 0.01 and an impressive pH accuracy of +/- 0.05. 20 min auto power down. Single touch, adjustable calibration up to 3 points. Waterproof housing (IP65 rated). Pen comes with 4x LR44 batteries.
    SKU:
    716374

    Retail: $126.50

    Special Price $95.96

  • Sure Test GroGuru Stem w/ 2 Sensors

    The sensors on the Sure Test® GroGuru Stem have been designed to provide you the info about your root zone to make your growing even more successful. These sensors measure the moisture content, Electrical Conductivity (EC), salinity and temperature of your medium. These lab rated sensors are highly accurate, very reliable and have passed SWAT certification conducted by Irrigation Association. The Stem communicates wirelessly with a Base unit called the Collector which can be up to 1000 feet away (batteries not included). The Stems report measurements from each of the sensors once every 30 minutes. This information is then reported to software on your desktop and/or smartphone app.
    SKU:
    716404

    Retail: $420.50

    Special Price $319.20

  • 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

  • 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 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 $273.00

  • Sure Test Temperature and Relative Humidity Data-Logger

    Track, plot, log, and create PDFs or Excel reports with The Sure Test® Temperature and Relative Humidity Data-Logger. Easy to use - plug and play with a USB 2.0 connector and no software or drivers needed makes data-logging a snap. LCD displays live temperature and %RH as well as minimum and maximum values while logging. Programmability includes sampling intervals, units, and start delays. Alarms can be set for range, type, and delays. Other features include status indicator, large memory capacity, and battery life indication.
    SKU:
    716402

    Retail: $105.50

    Special Price $73.78

  • Mad Farmer Get Down 55 Gallon (SPECIAL ORDER)

    Mad Farmer™ Get Down™ is proudly made in the USA and is specifically designed to reduce the pH levels of liquid nutrient solutions. It is compatible with all brands of nutrients, organic and/or synthetic. The Mad Farmer's Get Down™ contains only the finest ingredients. No dyes are added to mask the quality and clarity of his formula. Get Down™ contains three different pH acidifying agents, which optimizes it’s strength and stability. Check pH levels daily and make any necessary adjustments. The amount needed will vary. Use Mad Farmer’s NUTS™ to stabilize pH fluctuation.
    SKU:
    749992

    Retail: $925.00

    Special Price $900.00

  • Microbe Life Hydroponics pH UP, 1 qt

    Microbe Life Hydroponics pH UP is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. • Safely raises pH levels• Combines 2 pH adjusters for buffered effectiveness• Contains 3 electrolytes to help maintain osmotic balance• Will not harm plants  
    SKU:
    ML21399

    Retail: $24.95

    Special Price $22.64

  • Microbe Life Hydroponics pH DOWN, 1 qt

    Microbe Life Hydroponics pH DOWN is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. • Safely lowers pH levels• Combines 2 pH adjusters for buffered effectiveness• Contains 3 electrolytes to help maintain osmotic balance• Will not harm plants  
    SKU:
    ML21403

    Retail: $24.95

    Special Price $22.64

  • Microbe Life Hydroponics pH DOWN, 2.5 gal

    Microbe Life Hydroponics pH DOWN is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. • Safely lowers pH levels• Combines 2 pH adjusters for buffered effectiveness• Contains 3 electrolytes to help maintain osmotic balance• Will not harm plants
    SKU:
    ML21405

    Retail: $89.95

    Special Price $81.63

  • Bluelab Inline pH probe

    The Bluelab® In-line pH Probe can screw directly into female 1" NPT pipe fittings using the included adapter. Threaded probe head allows for simple installation direct into an irrigation line for effective in-line measurements.The high pressure rates pH probe has a pressure rating of 7 bar pressure or 100 psi.• Liquid flow naturally cleans the flat pH measurement surface• High pressure probe• Faster reading response• 3/4” NPT thread fits in-line mounting, use with ” adapter• Gel filled (non-refillable), double junction reference
    SKU:
    BLU6400

    Retail: $180.00

    Special Price $159.47

  • Bluelab Pulse Multimedia EC/MC Meter

    Bluelab® Pulse Multimedia EC/MC Meter is a new innovation that connects directly to your mobile device. Quickly spot check, correct, achieve better yield and grow healthier plants across a wide range of growing media including soil, coco coir, rockwool, potting mix and nutrient solution. The meter automatically sends and stores all your key plant statistics in the free Pulse Mobile App. It also features two extended prong spear tips, a low battery indicator and 1 AA alkaline battery. Ideal in agriculture, floriculture, container grown plants and greenhouses applications. Compatible with Android and Apple devices; no computer required. 2-year guarantee from date of purchase.
    SKU:
    BPMM500

    Retail: $299.00

    Special Price $180.00

  • Oakton EcoTester CTS Pocket Conductivity, Salinity, and TDS Meter

    Oakton® Conductivity, TDS and Salinity in one meter. Expanded 4-digit dual-line display shows conductivity and temperature readings simultaneously. Additional key provides an easier, more intuitive interface. Improved cap functions as a sample cup and as a stabilizing base to stand the meter upright. Rugged IP67-rated housing is waterproof and floats. Battery level indicator flashes when battery is low. Batteries are included. Conductivity Accuracy: 2% full-scale 1 LSD. TDS Accuracy 2% full-scale 1 LSD. Salinity Accuracy 2% full-scale 1 LSD. Temperature Accuracy 0.9°F (0.5°C) 1 LSD. Waterproof design.
    SKU:
    716124

    Retail: $104.99

    Special Price $94.43

  • Sure Test Pro EC / TDS Pen

    The Sure Test® Pro EC/TDS Pen reads EC, TDS and temperature (F° or C°) with automatic temperature compensation (ATC) for more reliable conductivity measurements. Auto or manual ranging for EC (uS/mS) and TDS (ppm/ppt). TDS conversion factor is selectable between 400 and 1000. Adjustable calibration values. Waterproof housing (IP65 rated). Comes with 4x LR44 batteries.
    SKU:
    716376

    Retail: $105.50

    Special Price $79.99

  • Sure Test Commercial Replacement pH Probe

    The Sure Test® Commercial Multi-Meter allows for easy measurement of pH and conductivity (EC or TDS) and temperature (F° or C°) in one versatile unit. It also has the ability to measure dissolved oxygen (DO) with the optional DO probe (716388 - sold separately) making it the most versatile handheld multi-meter available. This rugged meter includes automatic temperature compensation (ATC) for more precise pH readings. Easy to use and calibrate, this meter is an excellent choice for all in one nutrient management anywhere you take it. Comes with replaceable conductivity probe (716382), replaceable pH probe (716386), hard carrying/storage case and 6x AAA batteries. Waterproof housing (IP65 rated).
    SKU:
    716386

    Retail: $84.35

    Special Price $63.99

  • Sure Test Commercial Replacement DO Probe

    The Sure Test® Commercial Multi-Meter DO Probe allows for easy measurement of dissolved oxygen. For use with the Sure Test® Commercial Multi-Meter (716378 - sold separately).
    SKU:
    716388

    Retail: $151.50

    Special Price $115.19

  • Sure Test Commercial pH / EC / TDS / ORP Lab Meter

    The Sure Test® Commercial Lab Meter offers the ultimate in precision and accuracy. Dependably measure pH and conductivity (EC or TDS or Salt) and temperature (F° or C°) with ease. It also has the ability to measure Oxidation Reduction Potential (ORP) with the optional ORP probe (716398 - sold separately) - very useful when incorporating sanitizers (ozone, quaternary salts, hypochlorous acid, etc.) into your grow regimen. The meter uses automatic temperature compensation (ATC) for more precise readings of all parameters. Comes with replaceable conductivity probe (716394), replaceable pH probe (716392 - resolution of 0.01 and an impressive pH accuracy of +/- 0.02), and a 100v power supply and probe holder.
    SKU:
    716390

    Retail: $529.95

    Special Price $399.99

  • Sure Test Commercial Multi-Meter w/ pH Conductivity Probes (DO Probe Sold Separately)

    The Sure Test® Commercial Multi-Meter allows for easy measurement of pH and conductivity (EC or TDS) and temperature (F° or C°) in one versatile unit. It also has the ability to measure dissolved oxygen (DO) with the optional DO probe (716388 - sold separately) making it the most versatile handheld multi-meter available. This rugged meter includes automatic temperature compensation (ATC) for more precise pH readings. Easy to use and calibrate, this meter is an excellent choice for all in one nutrient management anywhere you take it. Comes with replaceable conductivity probe (716382), replaceable pH probe (716386), hard carrying/storage case and 6x AAA batteries. Waterproof housing (IP65 rated).
    SKU:
    716378

    Retail: $379.50

    Special Price $287.99