| Checker | Parameter | Ideal Range | Testing Frequency | Why Test? |
|
HI772 and HI755 |
Alkalinity in dKH (HI772) or ppm (HI755) |
142-215 ppm or 8-12 dKH |
Weekly to maintain, or as needed depending on your dosing schedule. |
Vital for coral calcification and skeletal formation; prevents pH swings, alkalinity burn, coral bleaching, and tissue loss; improves equipment performance. |
|
HI764 |
Nitrite (ppb) |
Under 150 ppb – the lower, the better |
First when setting up or cycling an aquarium, then as needed. |
To make sure waste is being properly recycled. |
|
HI758 |
Calcium (ppm) |
Between 350-450 ppm |
Weekly to maintain, plus every time you add or remove any organisms from your tank. |
Vital for coral calcification and skeletal formation |
|
HI736 |
Phosphorus (ppb) |
More than 0 but less than 20 ppb |
Weekly to maintain, or as needed if an excessive amount of algae growth is noticed. |
High levels will prevent coral calcification or cause excessive algae growth |
Hanna Instruments Marine Checker HC line provides quick and accurate results for alkalinity, calcium, nitrite, and phosphate/phosphorus in an easy-to-use digital readout. We designed the digital Checker HC to improve accuracy and repeatability over basic chemical test kits, which use color change as an indicator.
The Hanna Marine Alkalinity (dKH) Checker HC - HI772 and Alkalinity (ppm) Checker HC - HI755 provide a simple, accurate, and cost-effective way to measure alkalinity in parts per million (ppm) of calcium carbonate or as degrees Karbonathärte (dKH). Critical to the saltwater aquarium, alkalinity not only provides carbonate ions required for calcium carbonate skeletal regeneration of coral reefs, but it also acts as a buffer against large changes in pH.
Accurately testing calcium levels is critical for everyone from coral reef hobbyists to aquaculture farms and research facilities. The Hanna Marine Calcium Checker HC HI758 is designed to make this process easier. The HI758 gives you a digital readout, not a color change, which takes out the guesswork and subjectivity.
Nitrification is a multi-step process performed by nitrifying bacteria that converts ammonia to nitrate, with nitrite as a harmful intermediate product. Using the Hanna Marine Ultra Low Nitrite Checker HC - HI764 to check your aquarium's nitrite levels ensures a healthy environment for your fish, corals, and invertebrates.
Phosphorus is one of the most important components for living organisms. However, many saltwater aquariums have high phosphates which can lead to excess algae and poor coral growth. The Hanna Marine Ultra Low Phosphorus Checker HC - HI764 allows you to measure and maintain phosphate levels at the ideal low quantities that are often challenging to test with traditional test kits.
Many other test kits on the market rely on a color change that needs to be judged by sight. These are notoriously difficult to use, especially in the lower ranges. Hanna Instruments' Marine Checker line bridges the gap between simple chemical test kits and professional instrumentation. The one-button design makes testing easier and more accurate by outputting a consistent digital reading every time.
The Hanna Checker Plus pH Tester HI98100 helps you accurately measure your saltwater aquarium's pH level to make sure it stays between the acceptable range of 7.9 and 8.5. When pH is not properly monitored, corals and other marine organisms can be at risk. pH levels in an aquarium that are too low or too high – or levels that fluctuate too often – will put stress on marine life, which could cause them to die. Additionally, when pH levels drop too low it can prevent coral calcification from occuring.