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    Magnesium is a crucial element in saltwater environments, as it allows calcium and carbonate to be bioavailable for corals and other invertebrates. Therefore, consistent and accurate testing of magnesium levels in your marine aquarium is vital to ensure a healthy and thriving system. The HI783…

    $59.95 Regular Price: $
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    Accurately check pH, Alkalinity, Calcium, Low Range and High Range Nitrate, Ultra Low Range Nitrite, and Ultra Low Range Phosphate with one single, compact multiparameter tester! All-In-One Testing with Precise Results for Reef TanksThe HI97105 Marine Master Photometer is a waterproof tester that…

    $395.00 Regular Price: $
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    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 results and ability to…

    $59.95 Regular Price: $

    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 stores…

    $49.45 Regular Price: $59.95

    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 Instruments HIREEF2 Test kit includes…

    $275.00 Regular Price: $

    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…

    $59.95 Regular Price: $

    The HI782 Nitrate Checker HC by Hanna Instruments is a simple and accurate handheld colorimeter that uses the zinc reduction method to determine nitrate concentration in marine applications. With a digital read out, there is no more struggling to determine colors visually. The HI782`s high range of…

    $59.95 Regular Price: $

    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…

    $59.95 Regular Price: $

    Solution for cleaning cuvettes (vials) for photometers, colorimeters and turbidimeters from Hanna Instruments. Used with cuvette cleaning clothes 230 mL bottle

    $26.00 Regular Price: $

    Nitrite reagent refills for the easy to use, handheld Hanna Checker HI764 Nitrate Ultra Low Range as well as the Marine Master HI97105 Multiparameter Photometer. Individual reagent packets for 25 tests. Reagent refill for Hanna Checker Nitrite ULR HI764. Enough reagent for 25 tests.

    $10.00 Regular Price: $

    Matthews Beginner Test Kit bundle has everything you need to get started in testing your reef tank parameters with no need to hunt amongst the myriad of choices. Each test kit was hand-picked for ease of use and accuracy for that particular parameter, so you know youre getting the best option to get…

    $206.55 Regular Price: $229.50
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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…

    $59.95 Regular Price: $

    When you need to test the most critical parameters in your aquarium, dont waste time buying random test kits, get Randys Test Kit bundle and rest assured youre getting hobbyist-reviewed test kits that deliver clear and consistent results time after time. Randys Test Kit Bundle has all the essentials…

    $174.99 Regular Price: $
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    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 with Hanna…

    $59.95 Regular Price: $

    Phosphate Ultra Low Range reagent refills for the easy to use, handheld Phosphate ULR ppm Colorimeter HI774 Hanna Checker HC - Marine Water, as well as the Marine Master HI97105 Multiparameter Photometer. 25 packets of reagent Item #: HI 774 -25

    $10.00 Regular Price: $

    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 reading,…

    $75.00 Regular Price: $

    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…

    $59.95 Regular Price: $

    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 it perfect for…

    $55.00 Regular Price: $

    Building your arsenal of trustworthy test kits can be a long and expensive process, so why not skip the headache? We've asked a few of our long-time hobbyists for their recommendations based on their own trial and error-- they've done the years of experimenting, so you don't have to! Here, we've…

    $220.49 Regular Price: $244.99
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    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…

    $41.00 Regular Price: $

    Phosphorus Ultra Low Range reagent refills for the easy to use, handheld Phosphorus ULR Colorimeter HI736 Hanna Checker HC - Marine Water. 25 packets of reagent Item #: HI 736 -25

    $10.00 Regular Price: $

    Reagent refill for Alkalinity Colorimeter HI772 or HI755 Hanna Checker HC Marine Water, as well as the Marine Master HI97105 Multiparameter Photometer. Enough reagent for 25 tests. Item #: HI755-26

    $10.00 Regular Price: $

    NIST Traceable Salinity Calibration Hanna HI70024P Salinity Calibration Sachets are perfect for any conductivity probe or pen. The single-use sachets are made of light-blocking foil that prevents oxidation, ensuring the solutions are as fresh as the day it was packaged. Each sachet is marked with a…

    $1.99 Regular Price: $

    Thanks to its special formulation, Copper Power is one of the safest and yet most effective copper solutions for treatment of external parasites, such as ich and velvet. Copper Power contains a very stable form of copper medication with low levels of precipitation, and thanks to this it is able to…

    $4.49 Regular Price: $4.99
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    Bulk Magnesium Sulfate - Ultra Pure Magnesium Additive for your Reef Tank! Keep your reef balanced - Use with BRS Pharma Magnesium Chloride Maintaining proper magnesium levels helps achieve the essential balance of calcium and alkalinity in your tank by preventing excess calcium carbonate…

    $26.99 Regular Price: $29.99

    Phosphate reagent refills for the easy to use, handheld Hanna Low Range Phosphate Checker HI713. Reagents for 25 tests.

    $10.00 Regular Price: $

    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…

    $59.95 Regular Price: $

    NIST Traceable Salinity Calibration Hanna HI70024P Salinity Calibration Sachets are perfect for any conductivity probe or pen. The single-use sachets are made of light-blocking foil that prevents oxidation, ensuring the solutions are as fresh as the day it was packaged. Each sachet is marked with a…

    $27.00 Regular Price: $
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    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…

    $21.00 Regular Price: $

    Redesigned with new100 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, affordable and easy to…

    $59.95 Regular Price: $

    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 usingHanna's…

    $11.00 Regular Price: $
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    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 Instructions for Marine Alkalinity Standards: 1.…

    $12.00 Regular Price: $
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