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Your cart is empty. The HI772 Checker®HC (Handheld Colorimeter) provides a simple, accurate, and cost-effective way to measure alkalinity in degrees of carbonate hardness, commonly abbreviated as dKH. Critical to marine environments, alkalinity not only provides the carbonate ion required for calcium carbonate skeletal regeneration of coral reefs, but it also acts as a pH buffer against large changes in acidity. Designed as a more accurate alternative to chemical test kits, the HI772 provides quick, accurate results in a few easy steps.
Features at-a-glance:
Easier to use and more accurate than chemical test kits
Dedicated to a single parameter
Small size, big convenience
Ideal for: Aquaculture & Aquariums, Water Quality
Mathew
2025-09-05 12:11:54
Easy user friendly device for reef keeping.
Michael T.
2025-08-30 15:08:37
This was my first Hanna Checker, I was using Red Sea.This is easy to use, gives good results. No guessing when the color changed, especially if doing your testing in the evening when it's darker. I put the test vials into the checker the same way every time. Typically where the break is located in the "fill to" line. Put that towards me, make sure that it's clean. I haven't had the need to use fancy glass cleaners/ lens cleaners, just a paper towel if there are visible fingerprints. then Bam, you get your results. No guessing.
mando
2025-08-05 21:50:11
I was almost about to curse this product to the ground. I said to myself “man I should of listened to the negative reviews (although I am sure some have faulty products out of random chance). I realized that if I used it for a couple of days and it was fine and the next few days it wasnt fine, then it must be user error. I wasn’t following the instructions. Solved my own problem.
Denny
2025-07-20 12:10:19
Easy to use and pretty accurate compared to my other test kits.
Agustin
2025-06-25 12:50:12
Definitely recommend this vary easy to use accuracy is ok definitely off by a little nothing crazy but you can trust to keep tank good and looking great and growth on my sps is fast
Book Reviews
2025-06-04 09:15:07
I kept hearing about how Hanna checkers were the way to go. Now I know that to be true for myself. Super easy to use. No color matching, which is so inaccurate from person to person.
m6
2025-05-22 13:48:58
A very great product a great investment
Noel Velasco
2025-04-05 15:43:35
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Brightlight1001
2025-02-23 12:36:22
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Noodler
2025-01-20 14:49:03
This is an excellent means of determining the Alkalinity in a marine aquarium. After working through the simple instructions for the first time it only takes a couple of minutes to conduct the test on the next occasion. The ease of use encourages regular testing. I have to agree with the presenters of BRStv on Youe Tube that Alkalinity, not Calcium, is the key parameter in a marine aquarium, along with Specific Gravity and pH. These are vital 3.In spite of the cost, which is still quite reasonable, this Checker is indispensable. It takes a fraction of the time needed to use a conventional test kit and it has been widely proven to be highly accurate.You will soon wonder how you ever managed without it.
r
2024-11-26 16:23:41
Best and more accurate than other testers.Simple to use
Adrian
2024-11-22 15:32:15
Excellent, so quick and easy!
Donna
2024-11-12 11:53:23
But don’t buy refills on amazon there cheaper elsewhere
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