Reference

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    …should be almost no flex to the cartridge. * The initial couple minutes of water from your RO membrane will always be high, this is commonly referred to as TDS creep. Diverting the first few minutes of water down the drain can often greatly reduce DI resin consumption. * Maintain low levels…

    $13.99 Regular Price: $

    …should be almost no flex to the cartridge. * The initial couple minutes of water from your RO membrane will always be high, this is commonly referred to as TDS creep. Diverting the first few minutes of water down the drain can often greatly reduce DI resin consumption. * Maintain low levels…

    $14.99 Regular Price: $

    The only reference solution based on a saltwater matrix that includes 8 of the most popular parameters for saltwater aquariums in a single solution. Fauna Marin’s Multi-Reference Solution is used to check your home water test kits for accuracy. Using your water test kits at home, you can…

    $19.99 Regular Price: $

    …mg/L\n* Multi-cavity plate for simultaneous testing of up to 6 tests at the same time\n* Includes reference for test validation\n\n \n MultiTest Iron performs over 75 tests and contains a reference sample for validation. With the multi-cavity test plate, multiple tests can be run at the same time.\n…

    $15.99 Regular Price: $

    …Multi-cavity plate for simultaneous testing of up to 6 tests at the same time\n* Includes reference for test validation\n* \n\n \n MultiTest Phosphate performs over 75 tests and contains a reference sample for validation. With the multi-cavity test plate, multiple tests can be run at the same…

    $15.99 Regular Price: $

    …long continuous duty life expectancy, fast response and is non-toxic to aquarium systems.   Features * 10ft cable with high interference suppression jacket * Ag-AgCl reference * 99.9% pure platinum   Note: Calibration solutions sold separately

    $39.99 Regular Price: $

    …over 75 tests and contains a reference sample for validation, giving you confident in the results of your test.\n \n Features\n\n* Catalysis based, sensitive to less than 0.0025 mg/L\n* Multi-cavity plate for simultaneous testing of up to 6 tests\n* Includes reference for test validation\n* Marine…

    $15.99 Regular Price: $

    …Alkalinity Reagent * pH Reference * Alkalinity Reference * Alkalinity Pipette * Sample Pipette * Stir Rod * pH Color Chart Ammonia Test * Total Ammonia Reagent 1 * Sensor Container (6 sensors) * Total Ammonia Reference * Forceps * Sample…

    $39.99 Regular Price: $

    …measure the Calcium concentration in saltwater aquariums! Every test kit batch is certified and approved by Aquaforest ICP-OES testing reference solutions. Recommended Calcium Level - 400ppm - 450ppm   Aquaforest marine test kits are designed to quickly and accurately…

    $17.99 Regular Price: $

    …measure the Alkalinity concentration in saltwater aquariums! Every test kit batch is certified and approved by Aquaforest ICP-OES testing reference solutions. Recommended Alkalinity Level - 7dKH to 8dKH   Aquaforest marine test kits are designed to quickly and accurately…

    $12.99 Regular Price: $

    …is pre-wired for a ballast can make wiring a retrofit kit much easier.  With a quick disconnect service is simple, and can be reconnected within seconds.   Compatible with most ballasts. Harness Total Length is 8ft Long   Note: Dimmable reference wire not included.

    $16.99 Regular Price: $

    Dimmable ballast work with ATI fixtures or can be used in a retrofit fixture. Dimmable ballasts need a 0-10vDC reference for control which can be found on most common aquarium controllers.ATI replacement dimmable ballasts are some of the highest quality ballasts on the market. The ballasts are used…

    $69.95 Regular Price: $

    …mg/L\n* Multi-cavity plate for simultaneous testing of up to 6 tests at the same time\n* Includes reference for test validation\n* \n\n \n This test kitperforms over 75 tests and contains a reference sample for validation to ensure maximum accuracy.\n \n Specifications\n\n* Test Range: 0 to 25 mg/L…

    $15.99 Regular Price: $

    …Multi-cavity plate for simultaneous testing of up to 6 tests at the same time\n* Includes reference for test validation\n* Marine or Freshwater\n\n \n MultiTest Copper performs over 75 tests and contains a reference sample for validation. With the multi-cavity test plate, multiple tests can be run…

    $15.99 Regular Price: $

    …Includes reference for test validation\n* \n\n \n The values reported by this kit are expressed as nitrite and nitrate rather than nitrogen (to convert to nitrogen, simply divide by 3.3 and 4.4, respectively). MultiTest Nitrite & Nitrate performs over 75 tests and contains a reference sample for…

    $15.99 Regular Price: $

    …meet all of Hanna's requirements, using standards and reference instruments that are traceable to the National Institute of Standards (NIST) in the USA or to the internationally acceptable national physical standards. The standards and reference instruments used in calibration and tested are also…

    $39.00 Regular Price: $

    …total and free ammonia down to less than 0.05 mg/L\n* Multi-cavity plate for simultaneous testing of up to 6 tests at the same time\n* Includes reference for test validation\n* Marine or Freshwater\n\n \n This kit measures total (NH3and NH4+) and free ammonia (NH3 only) down to less than 0.05 mg/L…

    $15.99 Regular Price: $

    Use these gaskets to replace the existing gasket in your Schedule 80 bulkhead.   Available for bulkhead sizes 1/2", 3/4", 1", 1 1/2" and 2" (Sizes are nominal sizes that refer to the bulkhead size, not the measurement of the gasket).

    $3.99 Regular Price: $

    Use these gaskets to replace the existing gasket in your ABS bulkhead. Available for bulkhead sizes 1/2", 3/4", 1", 1 1/2" and 2" (Sizes are nominal sizes that refer to the bulkhead size, not the measurement of the gasket).

    $2.99 Regular Price: $

    Dimmable ballast work with ATI fixtures or can be used in a retrofit fixture. Dimmable ballasts need a 0-10vDC reference for control which can be found on most common aquarium controllers.ATI replacement dimmable ballasts are some of the highest quality ballasts on the market. The ballasts are used…

    $69.95 Regular Price: $

    …Control Interface Modules. If you have an Apex, ApexEL, ReefKeeper, GHL, Cerebra or any other type of aquarium controller that can manage 0-10V reference devices you can customize the brightness and tweak your Reef Brite LED lights to match your tanks desires perfectly.  Two Models…

    $104.10 Regular Price: $

    …temperature simple and easy. Compatibility Plug any heater up to 1000 W maximum load into the controller. Cross Reference Cross reference temperature abilities ensures the temperature is accurate and always correct. Smart Memory Chip Smart Memory Chip…

    $89.99 Regular Price: $
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    …probes letting you go longer between calibrations, and having to purchase and replace probes less frequently. The Double Junction isolates the reference gel and probe from proteins and other organics that may otherwise precipitate and clog, shortening the lifespan of the probe. * Longer…

    $74.95 Regular Price: $

    …probes letting you go longer between calibrations, and having to purchase and replace probes less frequently. The Double Junction isolates the reference gel and probe from proteins and other organics that may otherwise precipitate and clog, shortening the lifespan of the probe. * Longer…

    $84.95 Regular Price: $

    …measure the Magnesium concentration in saltwater aquariums! Every test kit batch is certified and approved by Aquaforest ICP-OES testing reference solutions.   Recommended Magnesium Level - 1260ppm - 1500ppm   Aquaforest marine test kits are designed to quickly…

    $17.99 Regular Price: $

    …probe which creates two chambers within the probe. The first one is filled with the reference gel containing mostly potassium chloride, silver chloride and reference probe. The second chamber has just reference gel containing mostly potassium chloride. This design prevents precipitation by keeping…

    $69.99 Regular Price: $

    …probe which creates two chambers within the probe. The first one is filled with the reference gel containing mostly potassium chloride, silver chloride and reference probe. The second chamber has just reference gel containing mostly potassium chloride. This design prevents precipitation by keeping…

    $59.99 Regular Price: $

    …Combo Pen.   We recommend calibrating your electrode any time that a new one is installed.   Specifications: Reference - Single, Ag/AgCl Junction - Cloth Electrolyte - Gel Max Pressure - 0.1 bar Range - 0-14 pH Operating Temp - 23 -…

    $55.00 Regular Price: $

    …and the exposed temperature sensors allow for rapid automatic temperature compensated pH measurements.    Hanna has a unique reference cell design that utilizes an extractable cloth junction for the pH electrode. Cloth junctions are well known for creating clogs that can cause…

    $49.50 Regular Price: $

    …it. * After 2 minutes of development time place the open test cuvette and the reference cuvette with the water sample into the comparator. Place the comparator on the color card in such a way that the reference cuvette is sitting on a colored field and the test cuvette on a white field. *…

    $22.25 Regular Price: $

    …is +/-1% * Calibration: Digital automatic calibration (one point) with digital fine tuning * Electrode: Replaceable glass sensor and reference tube electrodes * Housing: IP-67 Waterproof (submersible; floats) * Power source: 2x AAA Batteries (included) * Dimensions: 18.5…

    $79.99 Regular Price: $

    …Precision Hydrometer provides an exact and reliable measurement of specific gravity, and it never needs to be re-calibrated, so it's a perfect reference device for calibrating other equipment. * High precision hydrometer for determining the specific gravity in aquariums * Maximum…

    $31.25 Regular Price: $