$4.80 each
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$61.02 each
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-50%$49.69 each
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$56.27 each
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$18.76 each
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-50%$49.38 each
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$0.96 each
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-50%$132.69 each
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$2.15 each
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$180.80 each
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Results 841 - 860 of 876

Dual Outlet Analog 24 Hour Timer

Using an analog timer to automate your lighting adds convenience and encourages productive growth with consistent hours of light. Timers are also essential for many hydroponic system applications.Features• 15 minute on/off• 24 hour cycle• Controls two outlets simultaneously• 15A/1725W• UL-listed... Read More
$19.00 each
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Grotek ph Test Kit Paper Strips

 pH Test Paper, also known as litmus paper, will help you determine your pH measurement without a pH pen. Grotek pH Papers measure pH ranges from 5.5 to 8.0.... Read More
$16.45 each
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Grotek Black Pearl

Black Pearl™ is a unique organic product that blends a variety of renewable elements to provide soil nutrients and other soil-building components. High in organic matter, most of which comes from charcoal based carbon, it is a long-lasting soil builder. Black Pearl™ is best applied by mixing it into soil or soilless media rather than as a top dress. This product is not water soluble and should not be used in re-circulating hydroponic systems. Reconditioning medium: Apply 4 g (1 tsp)... Read More
-50%$7.55 each

Monkey Fan

Monkey Fans are the perfect product to keep air circulating throughout your crops. Whether growing in tents or rooms, you can hook these monkey fans on quickly, and regularly adjust their height. With a fit of 0.63-0.75 inches, the monkey fan hook allows you to attach it quickly to virtually every type of grow tent pole as well as PVC (commonly used to stretch trellis across canopies). This compact and versatile fan is great for air circulation as well as withstanding the humid environment... Read More
$31.50 each
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Grotek Electrode Storage Solution - 250ml

Electrode Storage Solution helps to keep your pH electrodes corrosion free between uses. These solutions are easy-to-use. Directions for use: Immerse probe in Electrode Storage Solution, making sure entire probe stays submerged. After storage, rinse with clean tap water or distilled water before using Store at room temperature between 20°C - 25°C Clean the probe with Electrode Cleaning Solutions A & B before storage if probe has been immersed in several nutrient solutions without... Read More
$7.75 each
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ST Soil-Stik pH Meter (Replacement Sensor)

Flat surface electrode measures pH in soils, semi-solids, solids and liquids - no more electrode breakage or clogged junctions RENEW indicator tells you when it... Read More
$93.50 each
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HM Digital COM-80: EC/TDS HydroTester

The COM-80 is easily the most advanced economically priced, reliable EC/TDS meter on the market. With its versatility and durability, it is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. FEATURES: Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for nutrient testing Four scales: EC: µS, mS; TDS: ppm, 0.5 (NaCl) & 0.7 (442™) Automatic... Read More
$54.00 each
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Emperor 600watt Metal Halide Bulb 6100K

Watts (W) Lumens Initial (lm) Color Temp (K) Operating Current Max. Starting Current Ave. Life (h) MOL (mm) Burn Position 600 6,100 Universal Lamp Voltage Warm up Time Reignition Time Bulb Shape Dia. (mm) Ballast MH ... Read More
-50%$43.98 each
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Milwaukee pH Meter pH600

Milwaukee's economical testers are easy-to-use and low cost instruments to measure quick and reliable pH. Range is 0.0 to 14.0pH. Calibration is manual, 1 point. Supplied complete with protective cap, calibration screwdriver, batteries and instructions.... Read More
$49.80 each
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Sure Test pH Test Strip Kit

The Sure Test® Kit includes everything you need to test the pH of your water or nutrient solution. Includes 15 ft of pH dependent color changing paper. The testers have a pH range from 5.5 to 8.0 in either 0.2 or 0.3 increments. Full color chart to match your pH test results.... Read More
$16.60 each
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Spectrum Tech. Light Scout Daily Light Meter

Spectrum Tech. Light Scout Daily Light Meter DLI 100 Measure the light “falling” on your plants Increase plant growth and quality Simultaneously compare light between multiple locations Simple, one button operation Affordable, first step in measuring light Meter runs for 24 hours and calculates the Daily Light Integral (DLI) Real-time intensity levels are shown in µmol·m-2·s-1 every 4 seconds over the course of a day Measures PAR light (Photosynthetically Active Radiation) ... Read More
-50%$43.70 each
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Spectrum Tech. Soil-Stik pH Meter

Flat surface electrode measures pH in soils, semi-solids, solids and liquids - no more electrode breakage or clogged junctions RENEW indicator tells you when it’s time to replace your electrode. Eliminates guesswork CAL alert tells you it’s time to recalibrate. Ensures accuracy Memory records and recalls 15 sequentially tagged readings allowing detection of changes over time 1- or 2-point calibration: automatically recognizes buffer solutions Automatic temperature compensation ... Read More
-50%$117.43 each
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Spectrum Tech. Infrared Crop Temp. Meter

Infrared technology makes difficult measurements fast, easy and affordable An excellent tool for measuring the temperature of turf and plant canopies Use selectable laser pointer to identify target spot Backlit LCD display Includes 9V battery, wrist strap and case ... Read More
-50%$65.93 each
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Spectrum Tech. Soil-Stik (Replacement Sensor)

Flat surface electrode measures pH in soils, semi-solids, solids and liquids - no more electrode breakage or clogged junctions RENEW indicator tells you when it’s time to replace your electrode. Eliminates guesswork CAL alert tells you it’s time to recalibrate. Ensures accuracy Memory records and recalls 15 sequentially tagged readings allowing detection of changes over time 1- or 2-point calibration: automatically recognizes buffer solutions Automatic temperature compensation ... Read More
-50%$46.75 each
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General Hydroponics Diamond Nectar

Diamond Nectar accelerates nutrient absorption into plant roots through a natural process called mineral chelation. Low molecular weight Humic acids grab immobile & molecularly heavy minerals & transport them into plant tissues for faster growth & bigger yields. Diamond Nectar is extracted from naturally mined Leonardite with a high profile of low molecular weight Humic acids. pH buffered for ideal plant growth: 5.8 to 6.2. Use for all plants in prepared soil/soilless mixes, coco... Read More
-50%$10.79 each

NARVA Super HPS 1000W 2100 UMOL

"The Most Advanced Mogul Style Lamp On The Market"The Narva Super HPS enables fast plant growth in all development phases and first-class yields. The particularly high luminous efficacy due to the NARVA super arc tube technology ensures a large blue fraction in the emissions spectrum and an effective PAR output during the whole life of the lamp. The Narva Super HPS surpasses the competition with its output up to 2100 Umol. This lamp is the only 2100 Umol mogul base lamp available on the market.... Read More
$88.00 each
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Growlite 315W Ceramic MH Lamp w/mogul base

PERFORMANCE Initial Lumens: 32,000 Lamp Lumens Per Watt: 102 Rated Life: 20,000 hours Color Temperature: 4000k Color Rendering Index (CRI): 98 Burning Position: Universal Bulb Designation: ED37 Fixture Rating: Open/Enclosed To 90% Warm Up Time: 2 min Hot Restart Time: 10 min ANSI Designation: C182/O PHYSICAL DATA / REQUIREMENTS Base Designation: E39 Bulb Diameter: 121 mm (max) Max Overall Length (MOL): 292 mm (max) Light Center Length (LCL): 178 ±5 mm Max Base... Read More
$160.00 each
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Results 841 - 864 of 883