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    CORAL has been hailed by critics as "the world's best reefkeeping magazine" with its stunning images and in-depth articles providing a wealth of knowledge for beginner and expert hobbyists alike. Each issue is written by leading aquarium experts and marine biologists, highlighting a variety of…

    $7.99 Regular Price: $

    …long-term coral health. More Info HI98319 Marine Salinity TesterEnsure the salinity of your saltwater tank is right where you want it. The pen style tester will give you the salinity reading along with the temperature of the water at the same time. With a 0.1ppt resolution, once you start using the…

    $275.00 Regular Price: $

    …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 combines accuracy and ease of use into one simple, portable design. Its advanced,…

    $395.00 Regular Price: $

    The Mastertronic is the latest addition to Focustronic's suite of water testing equipment. It is a standalone machine with the ability to accurately measure Nitrates, Phosphates, Magnesium, Calcium, Alkalinity, and organic matter in aquariums. Automatically measures and records important water…

    $1,299.99 Regular Price: $
    Out of Stock

    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: $

    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…

    $244.99 Regular Price: $
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    …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 ina droor or testing bin with your other equipment.The test process is extremely easy and…

    $49.45 Regular Price: $59.95

    …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 and in optimal range can reduce stress on your…

    $59.95 Regular Price: $

    …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 saltwater or freshwater aquariums. The HI98108…

    $55.00 Regular Price: $

    Digital testers are steadily paving their way into the hobby. The IceCap SPT03 Digital Pocket Tester helps eliminate the uncertainty when it comes to mechanical refractometers. The SPT03 is a portable, rugged, water resistant device that utilizes electric conductivity to determine the specific…

    $74.99 Regular Price: $

    …Longevity and Proper Operation: Always store upright with the cap full of buffer or storage solution MA9015 (do not use water). Clean your pH Pen Tester regularly by soaking in cleaning solution MA9016 Calibrate after cleaning and/or storage before testing to adjust for changes in the pH sensor.…

    $24.99 Regular Price: $
    Out of Stock

    Compatible with fresh or saltwater! No longer do you need to read color charts, trust Hanna's HI702 Copper Checker to know the precise amount of copper in your aquarium water. The High Range Colorimeter gives greater precision over previous models and gives you a digital reading on a large LCD…

    $59.95 Regular Price: $

    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…

    $59.95 Regular Price: $

    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: $

    Check for low ranges of Nitrites in your fresh water. The Hanna HI707 Checker HC Handheld Colorimeter for Nitrite LR 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,…

    $59.95 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: $

    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 keeping the…

    $59.95 Regular Price: $

    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: $

    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: $

    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: $

    Marine pH Checker reagent refills for the easy to use, handheld Marine pH Checker HC Colorimeter HI780 as well as the Marine Master HI97105 Multiparameter Photometer. Performs 100 Tests Item #: HI 780-25

    $15.00 Regular Price: $

    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…

    $59.95 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: $

    Reagent refill for Nitrate Low Range Colorimeter HI781 - Marine Water. Enough reagent for 25 tests. Item #: HI781-25

    $15.00 Regular Price: $
    Out of Stock

    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.…

    $59.95 Regular Price: $

    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: $
    Out of Stock

    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: $

    Reagent refill for Nitrate High Range Colorimeter HI782 - Marine Water as well as the Marine Master HI97105 Multiparameter Photometer. Enough reagent for 25 tests. Item #: HI782-25

    $15.00 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: $

    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: $

    Calcium reagent refills for the easy to use, handheld Hanna Calcium Checker as well as the Marine Master HI97105 Multiparameter Photometer. Individual reagent packets for 25 tests. Enough reagent for 26 tests. Item #: HI758-26

    $25.00 Regular Price: $

    Ensure the performance of your HI702 High Range Copper Checker with the HI702-11 Copper Standards. Each kit includes two cuvettes, one sealedcuvette that will read at 0ppm of copper, and then another cuvette that is tinted to an equivalent of 2.0ppm (± 0.10) @ 25°C. Each set it checked at…

    $21.00 Regular Price: $
    Out of Stock

    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…

    $229.50 Regular Price: $

    Alkalinity reagent refills for the easy to use, handheld Alkalinity Colorimeter HI775 Hanna Checker HC - Fresh Water. Enough reagent for 25 tests. Item #: HI775-25

    $21.00 Regular Price: $
    Out of Stock

    Nitrite Low Range reagent refills for the easy to use, handheld Nitrite LR Colorimeter HI707 Hanna Checker HC - Fresh Water. 25 Packets Reagent Item #: HI 707-25

    $13.00 Regular Price: $

    Iodine reagent refills for the easy to use, handheld Iodine Colorimeter HI718 Hanna Checker HC - Fresh Water. 25 Packets Reagent Item #: HI 718 -25

    $9.00 Regular Price: $

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

    $10.00 Regular Price: $
    Out of Stock

    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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    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: $

    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 Hanna Checker Instructions for…

    $12.00 Regular Price: $

    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: $

    Easily calibrate and test proper functionality of your Hanna Checker HI758 Calcium for marine water (saltwater). Contains Standard A and Standard B Follow instructions in packaging Acceptable results must be between 380 and 420 ppm at 25°C Hanna Checker Instructions for Nitrite ULR Standards: 1.…

    $17.00 Regular Price: $

    Easily calibrate and test proper functionality of your Hanna Checker HI764 Nitrite Ultra Low Range for marine water (saltwater). Contains Standard A and Standard B Follow instructions in packaging Acceptable results must be between 86 and 114 ppb at 25°C Hanna Checker Instructions for Nitrite…

    $12.00 Regular Price: $

    Easily calibrate and test proper functionality of your Hanna Checker HI713 Phosphate Low Range for fresh and marine water (saltwater). Contains Standard A, Standard B and 1 Packet 713-25 Reagent* Follow instructions in packaging Acceptable results must be between 0.92 and 1.08 ppm at 25°C…

    $13.00 Regular Price: $

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

    $12.00 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: $

    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

    $22.00 Regular Price: $

    1mL Graduated Syringes are an excellent resource for precision dosing of small amounts of liquid. They're the perfect for handling liquid reagents in test kits such as the Hanna Checkers, but can also be useful for very small doses of additives, medications, or even liquid foods. Accurately dose…

    $1.69 Regular Price: $

    Measures nitrate levels in both fresh & saltwater aquariums. Tests nitrate levels from 0 to 160 ppm. 90 tests per kit.Freshwater/Saltwater Nitrate Test Instructions:Why Test For Nitrate?Nitrate (NO3-) is produced in the aquarium by the biological filter. Beneficial bacteria in the biological…

    $12.79 Regular Price: $

    Salicylate test measures ammonia levels in both fresh & saltwater aquariums. Ammonia, the #1 killer of tropical fish, is continually produced in the aquarium from fish waste & uneaten fish food. Tests ammonia levels from 0 to 8 ppm. Test kit of 110 tests.Why test for Ammonia?Tropical fish…

    $14.29 Regular Price: $

    This kit tests for harmful nitrite and measures levels from 0 to 5.0 ppm. Regular testing for nitrite is an essential part of routine aquarium maintenance. Aquarium water should be tested for nitrite once a week to make sure the nitrite does not reach undesirable level. Tests for nitrite in…

    $10.99 Regular Price: $
    Out of Stock

    The API Reef Master Test Kit tests 4 key parameters calcium, carbonate hardness, phosphate, and nitrate to keep reef inhabitants healthy. Testing is fast, easy, and accurate. The kit includes 4 glass test tubes with snap-tight caps, a holding tub, and a step-by-step instructional booklet with a…

    $32.79 Regular Price: $

    Tropic Marin Professional Lab is a complete test kit for monitoring water values in marine aquariums. It contains highly precise tests for phosphate, nitrite, nitrate, calcium, magnesium, and carbonate hardness. Reference solutions for Multi-Standard and NP-Standard, as well as illustrated…

    $164.28 Regular Price: $

    Know what is in your water! Why Does BRS Recommend This? We have been utilizing Triton's ICP-OES testing system for some time with aquariums, additives, and almost any other liquid that we have wanted to know what is in it exactly. Triton now gives you the ability to know what is in your reef tank…

    $49.00 Regular Price: $

    Know what is in your water! Why Does BRS Recommend This? We have been utilizing Triton's ICP-OES testing system for some time with aquariums, additives, and almost any other liquid that we have wanted to know what is in it exactly. Triton now gives you the ability to know what is in your reef tank…

    $141.00 Regular Price: $
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    Know what is in your water! Why Does BRS Recommend This? We have been utilizing Triton's ICP-OES testing system for some time with aquariums, additives, and almost any other liquid that we have wanted to know what is in it exactly. Triton now gives you the ability to know what is in your reef tank…

    $270.00 Regular Price: $
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    Simple, Fast, & Consistent If you need a fast and accurate alkalinity test kit, the Tropic Marin Basic KH Test Kit will let you test your saltwater aquarium's alkalinity level in a matter of seconds. The test only requires a single reagent which reduces the chance of errors happening while the…

    $14.32 Regular Price: $

    This kit allows for easy and accurate measuring of calcium levels to help in maintaining a healthy aquarium.Why test for Calcium?Monitoring calcium levels is essential for keeping a successful reef aquarium. Reef organisms use calcium to build a calcium carbonate skeleton. Over time, as the calcium…

    $12.79 Regular Price: $

    Vital water parameters, at a glance! The Aquavital Marine Test 5-in-1 offers 1 minute test results on five of the most important parameters in your aquarium. Sometimes you dont have 10 minutes to sit around and open bottles of reagents and go drop by drop, test by test. Even experienced aquarists…

    $24.20 Regular Price: $
    Out of Stock

    Accurately measure the ammonia (NH3/NH4) in your saltwater aquarium with the advanced colorimetric test from Red Sea. 100 NH3/NH4 tests Accuracy: .2 ppm Range: 0-2 ppm Test Type: Colorimetric Red Sea Ammonia Test – Instructions 1. Using the syringe provided, place exactly 5 mL of the water to…

    $21.99 Regular Price: $

    Accurate, Fast, Reliable Alkalinity is probably the easiest test and by doing routine alkalinity tests it is easy to keep a pulse on your aquariums carbonate intake. The intake of carbonate by corals is done in a relatively balanced ratio and can also be used to know when to dose other additives.…

    $24.21 Regular Price: $

    Measures ammonia levels from 0 to 6 ppm in fresh or saltwater in one easy step. Just dip & read!25 ct

    $15.79 Regular Price: $
    Out of Stock

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

    $9.00 Regular Price: $
    Out of Stock

    Reagent refills for Hanna Total Chlorine Checker (HI711). Enough reagents for 25 tests

    $9.00 Regular Price: $
    Out of Stock
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