The HI774-25 are the replacement reagents for the HI774 Phosphate Ultra Low Range Checker® HC. These high-quality reagents are manufactured...

The HI736-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Phosphorus...

The HI782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for...

The HI758U-26 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Marine...

The HI774 Ultra Low Range Phosphate Checker® HC (Handheld Colorimeter) is a cost-effective way to measure phosphate in marine systems,...

The HI783-25 are the replacement reagents for the Marine Magnesium Checker® HC - HI783. These high-quality reagents are manufactured in...

The HI713-25 are the replacement reagents for the HI713 Phosphate Low Range Checker HC. These high-quality reagents are manufactured in...

The Hanna Marine Alkalinity (dKH) Checker bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits...

The HI702-25 are the replacement reagents for the HI702 Copper High Range CheckerHC. These high-quality reagents are manufactured in our...

The HI755-26 and HI772-26 are interchangable, same reagent if one is out of stock.   The HI755-26 are the replacement...

Designed to bring simplicity to salinity testing during the any process, the HI98319 Marine Salinity Tester measures conductivity (EC) to...

Our Marine Magnesium Checker HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples....

pH Value @25C 10.01 Size 20 mL sachet HI70010P is a premium quality pH 10.01 calibration buffer produced in accordance...

pH Value @25C 7.01 Size 20 mL sachet HI70007P is a premium quality pH 7.01 calibration buffer produced in accordance...

The HI784-25 includes the three replacement reagents needed for the Marine Ammonia Checker HC - HI784. These high-quality reagents are...

5 x  Single Pack of Fluid (5 packets total)   HI70024P is a premium quality 35.00 ppt salinity calibration solution...

1 Single Pack of Fluid   HI70024P is a premium quality 35.00 ppt salinity calibration solution that is NIST traceable...

Easier to use and more accurate than chemical test kits Adaptation of Standard Method Ascorbic Acid Accuracy 10 ppb 5%...

Marine Master Waterproof Wireless Multiparameter PhotometerpH, Alkalinity, Ammonia, Calcium, Magnesium, Nitrate Low Range(reagents sold separately), Nitrate High Range, Nitrite Ultra...

Don’t worry about the subjectivity of color charts, trust our handheld colorimeter for accurate measurements for your water testing.  ...

The HI731315 are spare glass cuvettes and plastic caps used with the HI7XX Checker® HC colorimeters. Each cuvette has a...

HI 758 Calcium Checker HC is supplied with 2 sample cuvettes and caps, reagents for 25 tests, (1)1.5V AAA battery,...

Easier to use and more accurate than chemical test kits Adaptation of Standard Method 4500-P E Accuracy 4% 0.04 ppm...

Hanna Marine Nitrate HR certified standard kit

1 Full Box of 25 Single Packs   HI70024P is a premium quality 35.00 ppt salinity calibration solution that is...

The HI781 Marine Nitrate Low Range Colorimeter is designed to accurately determine low range nitrate levels in saltwater aquariums and...

The HI780 Checker HC (Handheld Colorimeter) is a simple, accurate and cost effective way to measure pH in saltwater.  ...

The HI98108 pHep+ pH tester provides high accuracy measurements in a rugged pocket-sized design. This meter features an exposed temperature...

Hanna Instruments Marine Algae & Nutrient Management Kit Easy-to-read, instant digital results Compact and portable Simple one-button designs and straightforward...

Our Marine Ammonia Checker HC (HI784) is designed to accurately and quickly determine the ammonia level in marine (saltwater) samples....

The only salt water Alkalinity Tester at this price! Easier to use and more accurate than chemical test kits Colorimetric...

The HI731331 are the replacement glass cuvettes used with the HI96 series portable photometers and turbidity meters. Each cuvette has...

Get your replacement reagents for your HI781 Marine Nitrate Low Range Colorimeter today. These high-quality reagents are manufactured in our...

The Marine pH Checker® HC® Calibration Check Set - HI780-11 provides a simple solution to validating the Marine pH Checker®...

The Phosphate Ultra Low Range Checker® HC Calibration Check Set provides a simple solution to validating the Phosphate Ultra Low...

The Checktemp 1 Digital Thermometer - HI98509 is a high-accuracy thermometer with a 1 m (3.3’) flexible, silicone cable connecting...

The HI764-25 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their...

To be used with cuvets (item number HI-731331, not for photometer cuvets)for photometers and turbidity meters. They are notched to...

The HI731321 are the replacement glass cuvettes used with the HI7XX Checker HC colorimeters and the HI832XX benchtop photometers. Each...

    The HI 98501 Checktemp® is a digital thermometer with stainless steel penetration probe. It delivers high accuracy temperature measurements...

The HI 98129 Combo waterproof tester offer high accuracy pH, EC/TDS and temperature measurements in a single tester! No more...

The HI96822 is a rugged, portable digital refractometer designed for the measurement of salinity of natural or artificial seawater. The...

Cuvet cleaning solution (230 mL)

Stop struggling to get accurate results for your saltwater aquarium with our simple handheld colorimeter. Our nitrite colorimeter fills the...

The HI740271 is a replacement filter holder with Luer lock (1 pc.) for use with the HI781 Low Range Marine...

Hanna 10 mL syringe with Luer lock