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    Easy and Accurate Nitrate Testing for your Saltwater Aquarium! Get highly accurate results with the HI781 Marine Nitrate Low Range Colorimeter. With a digital read out, there is no more struggling to determine colors visually. This nitrate tester's compact design fits in your pocket or easily…

    $42.46 Regular Price: $49.95

    Designed for Simple Aquarium Salinity Testing Hanna Instruments HI98319 Marine Salinity Tester measures electrical conductivity (EC) to determine the salinity of natural and artificial seawater. Within seconds, the salinity and temperature are measured, and then using the temperature…

    $58.65 Regular Price: $69.00

    The HI774 Ultra Low Range Phosphate Checker® is a cost-effective way to measure phosphate in marine systems, including reef tanks. Excessive phosphate levels can prevent calcification, skeletal formation, and growth of many coral species, particularly those referred to as SPS or small-polyp…

    $42.46 Regular Price: $49.95
    Out of Stock

    Why does BRS recommend this? The Hanna Alkalinity checker is an awesome little tool that now will give results in DKH values that are much more common in the aquarium hobby. It will also give you accurate easy to read results with the large LCD display. We like the repeatable…

    $42.46 Regular Price: $49.95

    Easy Digital Testing with Precise Results for Reef Tanks If you ask anyone what are the most important parameters to monitor in a reef tank for good coral growth and health, pretty much everyone will answer with Calcium, Alkalinity, & Phosphates. Hanna…

    $216.75 Regular Price: $255.00
    Out of Stock

    Why does BRS recommend this? The Hanna Phosphate Checker is an awesome little tool that will give you accurate easy to read results.  If you have bad eyes or have a hard time with color change test kits, the digital readout on the Hanna checkers is super easy to read.  The biggest key…

    $42.46 Regular Price: $49.95

    Knowing the temperature of your reef tank is very important, and with the Hanna Checktemp HI98509 Digital Thermometer, you can accurately know your aquariums temperature within 0.5°F. Each Checktemp comes with a 3.3' silicone cable that has a stainless steel probe at the end that gives rapid…

    $33.15 Regular Price: $39.00

    The HI731339P is a volumetric pipette designed to measure and transfer exactly 100 µL of solution to a cuvette. To obtain the highest accuracy and precision from the Hanna Instruments HI758 Calcium Checker it is necessary to add exactly 100 µL of aquarium saltwater to the cuvette. Any…

    $17.00 Regular Price: $20.00

    Extra cuvettes (vials) for your Hanna Colorimeter Checkers. * Caps NOT included * Precision glass, necessary for taking accurate measurements * For most accurate readings, cuvette must be clean and free of scratches

    $17.85 Regular Price: $21.00

    Monitoring phosphorus concentration in saltwater is important because it can cause corrosion if levels are too high. The Hanna HI736 Checker HC Handheld Colorimeter for Phosphorus ULR bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to…

    $42.46 Regular Price: $49.95

    The Hanna Alkalinity checker is an awesome little tool that will give you accurate easy to read results.  If you have bad eyes or have a hard time with titration test kits, the digital read out on the Hanna checkers is super nice and easy to read.  The biggest key with Hanna checkers is…

    $42.46 Regular Price: $49.95

    Easily calibrate and test proper functionality of your Hanna Checker HI755 Alkalinity for marine water. * Contains Standard A and Standard B * Follow instructions in packaging * Acceptable results must be between 90 and 110 ppm at 25°C   Hanna Checker…

    $10.20 Regular Price: $12.00

    Ensure the performance of your HI774 Ultra Low Range Phosphate Checker with the HI774-11 ULR Phosphate Standards. Each kit includes two cuvettes, one sealed cuvette that will read at 0ppb of Phosphate, and then another cuvette that is tinted to an equivalent of 100ppb (± 0.10) @ 25°C.…

    $10.20 Regular Price: $12.00

    Reagent refill for Alkalinity Colorimeter HI772 or HI755 Hanna Checker HC - Marine Water. * Enough reagent for 25 tests. * Item #: HI755-26

    $7.65 Regular Price: $9.00

    Phosphate Ultra Low Range reagent refills for the easy to use, handheld Phosphate ULR ppm Colorimeter HI774 Hanna Checker HC - Marine Water. * 25 packets of reagent * Item #: HI 774 -25

    $7.65 Regular Price: $9.00

    Have your pH readings displayed through a large LCD window down to a resolution of 0.01 pH.    Monitor your aquariums temperature and pH all with a single pen-style tester. Hanna's HI98108 Waterproof pHep+ Tester can give you pH readings from 0.00 all the way up to 14.0 pH making…

    $42.08 Regular Price: $49.50

    The HI780 Marine pH Checker HC is a simple, accurate and cost effective way to measure pH in saltwater. With a digital readout, there is no more struggling to determine colors visually. This pH tester's compact design stores easily with your other testing equipment. Keeping your aquarium pH stable…

    $42.46 Regular Price: $49.95

    Easily calibrate and test proper functionality of your Hanna Checker HI772 Alkalinity (DKH) for fresh and marine water. * Contains Standard A and Standard B * Follow instructions in packaging * Includes certificate of analysis * Reusaable with long shelf life Hanna…

    $17.00 Regular Price: $20.00

    Perfect for the Hanna Calcium Checker! Ultra-Pure deionized water that keeps your titration tests accurate and repeatable. The biggest complaint about the Hanna Calcium Checker is when the sample is diluted, if the fresh water source is not pure, it can cause irregular readings and…

    $8.50 Regular Price: $10.00
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    Four simple steps to results. Easily and accurately test for low range ammonia in fresh water with the Hanna Checker Colorimeter - Ammonia Low Range for Fresh Water (HI 700). Designed to be more accurate alternative to chemical test kits. First, add sample to the included cuvette. Next, insert…

    $42.46 Regular Price: $49.95

    Reagent refills for Hanna Free Chlorine Checker (HI701). * Enough reagents for 25 tests

    $10.20 Regular Price: $12.00

    Electrode storage solution from Hanna Instruments for pH and ORP probes. * Minimizes clogging and ensures fast response time * Store the electrode with a few drops in the protective cap * 230 mL

    $10.20 Regular Price: $12.00

    Easily calibrate and test proper functionality of your Hanna Checker HI736 Phosphorus Ultra Low Range for marine water (saltwater). * Contains Standard A and Standard B * Follow instructions in packaging * Acceptable results must be between 90 and 110 ppb at 25°C …

    $11.89 Regular Price: $13.99

    Phosphate reagent refills for the easy to use, handheld Hanna Phosphate Checker.  * Enough reagent for 25 tests.

    $7.65 Regular Price: $9.00
    Out of Stock

    Determine the alkalinity levels in your fresh water. The Hanna HI775 Checker HC Handheld Colorimeter for Alkalinity in fresh water bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water…

    $42.46 Regular Price: $49.95

    Four simple steps to results. Easily and accurately test for ultra-low range total chlorine in with the Hanna Checker Colorimeter - Total Chlorine Ultra-Low Range (HI 761). Designed to be more a more accurate alternative to chemical test kits. First, add sample to the included cuvette. Next, insert…

    $42.46 Regular Price: $49.95

    Check for Nitrite easily in your tank. The Hanna HI764 Checker HC Handheld Colorimeter for Nitrite ULR bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent.…

    $42.46 Regular Price: $49.95

    Four simple steps to results. Easily and accurately test for free chlorine with the Hanna Checker Colorimeter (HI 711). Designed to be a more accurate alternative to chemical test kits. First, add sample to the included cuvette. Next, insert the sample into the Checker and zero the instrument with…

    $42.46 Regular Price: $49.95

    If you have lost or broken the included cuvettes and caps that were included with your Hanna Checker or simply just want an extra set on hand, we carry replacements directly from Hanna. Over time the glass vials can become stained and discolored which can lead to inaccurate readings. We suggest…

    $6.80 Regular Price: $8.00

    Replacement caps for Hanna cuvettes HI731321. * 4 caps included

    $22.95 Regular Price: $27.00

    Redesigned with new 100 µL Pipette Accurately check your reef tanks calcium level with the Hanna HI758 Calcium Checker. Three simple steps to results. The Hanna Calcium Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate,…

    $42.46 Regular Price: $49.95

    Waterproof pH, Electrical Conductivity, Total Dissolved Solids, and Temperature Metering Pen Highly Accurate readings right out of the box! Every HI98129 is professionally calibrated to 7.01 and 10.01pH and 1382ppm. * Lightweight * Floats * Super Accurate * Large LCD…

    $134.29 Regular Price: $157.99