Product Code: RHA98319
Designed to bring simplicity to salinity testing during the any process, the Hanna Salinity Tester measures conductivity (EC) to determine the salinity of natural and artificial seawater. Within seconds, the salinity and temperature are digitally displayed on the LCD.

• Waterproof and floats!
• Includes 4x of the Salinity Calibration Fluid Packets.
• Automatic Calibration – A 35.00 ppt solution is used for calibration and automatically recognized when in calibration mode.
• Displays results in parts per thousand (ppt), Practical Salinity Units (PSU), or specific gravity (S.G.)
• Salinity readings are performed by an amperometric graphite probe that resists oxidation, providing better repeatability in measurements. The use of graphite also reduces the polarization effect common with testers that use two stainless steel pins.
• Accuracy @ 25 C/77 F is ±0.001 S.G.

Product Code: RHA00764
Check for Nitrite easily in your tank. The Hanna Ultra Low Range Marine Nitrite Colorimeter Checker 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. Last, place the vial into the Hanna Nitrite Checker, press the button and read the results. Done. Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico.

Product Code: RHA00780
The Hanna Marine pH Colorimeter Checker 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 and in optimal range can reduce stress on your fish and aquatic animals, helping them resist disease and tolerate other stressors. Maintaining an ideal pH can also dramatically improve growth, behavior, and overall appearance of corals.

Product Code: RHA00781
Get highly accurate results with the Hanna Low Range Marine Nitrate Colorimeter Checker. 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 in a drawer or testing bin with your other equipment. The test process is extremely easy and delivers guess-free results in just a few minutes. Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico.

Product Code: RHA00772
Get accurate results for your saltwater aquarium with the simple Hanna Seawater Alkalinity (dKH) Colorimeter Checker. This alkalinity colorimeter bridges the gap between alkalinity test kits and advanced instrumentation. Standard test kits have limited accuracy since they rely upon the human eye to match colors. This handheld colorimeter eliminates the hassle of matching to a color chart by providing a direct saltwater alkalinity result in dKH units.

Product Code: RHA00782
The Hanna Marine Nitrate HR (ppm) Colorimeter Checker is a simple, accurate, and cost-effective way to measure nitrate from 0.00 to 5.00 ppm (as NO3–) in your saltwater aquarium. For samples containing 5.0 to 50.0 ppm nitrate, follow the approved dilution procedure.

Nitrate is a by-product of the Nitrogen cycle. Excessive amounts of nitrates in a reef aquarium can promote the growth of undesirable organisms including algae and dinoflagellates while insufficient amounts can lead to starvation in which SPS and other corals will show signs including the loss of color and paleness.

Product Code: RHA00774
With the Hanna Ultra Low Range Phosphate Colorimeter Checker, you won't have to worry about the subjectivity of color charts. The Hanna colorimeter eliminates the effort of matching to a color chart by delivering a direct copper result digitally.

Excessive phosphate levels can prevent calcification, skeletal formation, and growth of many coral species, particularly those referred to as SPS or small-polyp stony. In addition, high phosphate levels can cause nuisance algae growth in your reef tank. This can become problematic because algae often outcompetes sessile organisms for light, nutrients, and space, jeopardizing long term coral health in your reef. Testing for phosphates is standard practice for saltwater aquariums and provides valuable insight into your reef tank’s water chemistry to help ensure long-term coral health.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA00758
With the Hanna Calcium Colorimeter Checker, you won't have to worry about the subjectivity of color charts. The Hanna colorimeter eliminates the effort of matching to a color chart by delivering a direct copper result digitally.

The Hanna Calcium Colorimeter Checker uses a 100 to 1 dilution for analysis and thus requires deionized or distilled water absent of calcium to function correctly. Calcium can be found in many freshwater sources and this any amount present in the water used at the C1 phase can cause false high readings. In addition, many hobby grade reverse osmosis deionized water systems may not adequately remove calcium. This can vary based on the types of filters used, their effectiveness and frequency of replacement. We recommend using deionized water with low conductivity or pure vapor distilled water commonly found in most pharmacies.

Product Code: RHA00713
With the Hanna Low Range Phosphate Colorimeter Checker, you won't have to worry about the subjectivity of color charts. The Hanna colorimeter eliminates the effort of matching to a color chart by delivering a direct phosphate result digitally. Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA00702
With the Hanna High Range Copper Colorimeter Checker, you won't have to worry about the subjectivity of color charts. The Hanna colorimeter eliminates the effort of matching to a color chart by delivering a direct copper result digitally.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA75826
25 reagent tests for the Hanna Calcium Colorimeter Checker.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA78125
25 packs of the reagent for the Hanna Low Range Marine Nitrate Colorimeter Checker.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA77226
25 reagent tests for the Hanna Calcium Alkalinity (dKH) Checker.

Product Code: RHA77425
25 reagent tests for the Hanna Ultra Low Range Phosphate Colorimeter Checker.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA70225
25 packs of the reagent for the High Range Copper Colorimeter Checker.

Note: We can not ship this Test Kit expedited or to Hawaii, Alaska or Puerto Rico

Product Code: RHA71325
25 packs of the reagent for the Hanna Low Range Phosphate Colorimeter Checker.

Product Code: RHA70024
The Hanna Salinity Calibration Solution is for the Hanna Salinity Tester. This single-use sachet is 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 lot number that can be traced back to its original batch and is stable for up to 5 years in its packaging.