Water Testing

This reagent works with both the 755 & 772 Hanna checker.  It may come with the tag 755-26 or 772-26, both reagents work with both checkers. Extreme Accuracy. Easy to Test in 4 Steps - Zero the...

HI782-25 (25 tests) The HI782-25 are the replacement reagents for the HI782 Nitrate High Range Checker.  These high quality reagents are manufactured in our state-of-the-art facility and are clearly...

Reagents for the HI774. Our HI774 Ultra Low Range Phosphate Checker will be essentially the same specifications as the HI736 Ultra Low Range Phosphorus Checker however it will not require a...

Extreme Accuracy. Easy to Test in 4 Steps - Zero the Checker, Add a regent to your water sample, Insert the Vile in the Checker, Read the Numbered Results. BOOM EASY. ZAIR. Zero, Add, Insert, Read...

The HI736-25 are the replacement reagents for the HI736 Phosphorus Ultra Low Range Checker HC. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked...

Extreme Accuracy. Easy to Test in 4 Steps - Zero the Checker, Add a regent to your water sample, Insert the Vile in the Checker, Read the Numbered Results. BOOM EASY. ZAIR. Zero, Add, Insert, Read...

Neptune Systems single-use pH calibration packets make calibrating your probes simple and fast. Just tear open the top, and a stick your probe into the solution when performing the calibration...

The ATI ICP-OES Pro kit is identical to the original ATI ICP-OES test. The ATI ICP-OES Pro Water Analysis is a laboratory water analysis of 43 parameters in a reef tank that provides a complete...

We are pleased to announce our NEW HI98319 waterproof salinity and temperature tester! Waterproof and floats! Includes 4x of the Salinity Calibration Fluid Packets.

Use this calibration solution to calibrate your Conductivity Probe and PM2 for salinity monitoring.

The HI782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for saltwater aquariums and marine applications. With a digital...

Dueto the nature of the chemicals used in the reagents, all orders that include Trident NP reagents must ship ground only.   These NP Reagents CANNOT ship outside the contiguous 48 US States due to...

Ammonia Alert™ is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia...

This is the new Liquid Only test.  There are now two liquids, no powder. Magnesium is present in NSW in a fairly high concentration (1300 - 1400 mg/L). Magnesium is an essential part of chlorophyll,...

The HI702-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Copper High Range Checker® HC. These reagents follow the...

The PINPOINT® pH Electrode equals and exceeds lab quality by both specifcation and design.  The PINPOINT® pH Electrode has been designed as the most rugged, precise and full-featured probe offered to...

Calcium is a major constituent of calcareous algae, skeletal material of hard corals and the skeletal needles of soft/leather corals. Calcium also fulfills many biological functions.Quite often a too...

HI70007P is a premium quality pH 7.01 calibration buffer solution. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is...

Testing is Performed in Bradenton FLORIDA USA!  Kit includes a prepaid USPS Label. Looking for an accurate, comprehensive, fast, and easy way to test your aquarium? Then look no further! Reef Lab's...

It is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the...

The Hanna Marine Alkalinity (dKH) Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely...

Our HI774 Ultra Low Range Phosphate Checker will be essentially the same specifications as the HI736 Ultra Low Range Phosphorus Checker however it will not require a conversion but read directly in...

Calcium alone cannot form the skeletal material of corals and allow calcareous algae to grow. Some other substances are needed as well. A few other constituents are carbonate and bicarbonate. These...

A too high nitrate concentration can result in unwanted algae-growth and these might irritate corals in their neighborhood. Nitrate as such also retards coral growth. The nitrate concentration in a...

HI70004P/H17007P/HI0010P are premium quality pH 4.01/7.01/10.01 calibration buffer solutions. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring...

This is the new reagents set with 1x Powder, 1x Liquid. These Reagents are for use with the HI783 Marine Magnesium Checker. These high-quality reagents are manufactured at the Hanna state-of-the-art...

The HI731315 are spare glass cuvettes and plastic caps used with the HI7XX Checker® HC colorimeters. Each cuvette has a 10 ml level mark to measure the appropriate volume. The HI731315 includes 2...

Another American Marine first. ORP/REDOX calibration fluid. With a precise measurement of 400mV this calibration fluid is included with every PINPOINT® ORP Monitor and PINPOINT® ORP Controller...

Now Includes a Prepaid USPS First Class Shipping Label + Testing is Now Done in the USA! The results of this test provide you with the most detailed analysis of marine aquarium water you've ever...

THESE ARE THE NEWLY UPDATED REAGENTS.  Now 1x powder and 1x liquid.  The testing process is the same as Alkalinity HI772 with one second liquid reagent. The HI783 Marine Magnesium Checker HC is a...

The HI98103 Checker pH tester has been designed with many advanced features while maintaining the look and feel of the original Checker. The redesigned Checker now offers automatic calibration to one...

Extreme Accuracy. Easy to Test in 4 Steps - Zero the Checker, Add a regent to your water sample, Insert the Vile in the Checker, Read the Numbered Results. BOOM EASY. ZAIR. Zero, Add, Insert, Read...

The Fauna Marin Reef ICP Total Test gives a quick, accurate, and easy overview of over 90 water values in reef aquariums. From macro elements to trace elements and pollutants, you get a complete...

HI70010P is a premium quality pH 10.01 calibration buffer solution. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one...

Get your replacement reagents for your HI701 Free Chlorine Checker® HC today. These high-quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot...

The Salifert Core Alkalinity, Calcium, and Magnesium Combo Test Kit is a professional-grade testing suite designed specifically for reef aquarium hobbyists. This "Big 3" bundle provides the essential...

Free Case w/ Purchase! Just Add To Cart. (While Supplies Last. Valid Through August 29, 2026) This refractometer does not come with a case or battery. The new Milwaukee MA887 Seawater Digital...

FREE ON ORDERS OF $20 or MORE! For safe and precision transfer of liquids, can be used in many occasions, like testing aquarium water, extracting essential oils, mixing fragrance, and homemade...

Get accurate water testing 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...

Foundation Pro Multi test kit High accuracy titration tests for the accurate measurement of the<