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Hanna Marine Alkalinity (dKH) Checker® HC - HI772

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$64.95 Why this price?
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Eligible for Return, Refund or Replacement within 30 days of receipt

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Availability: Only 5 left in stock, order soon!
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Arrives Monday, Nov 25
Order within 6 hours and 12 minutes
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Features

  • Compact, Portable Design
  • Built-in Timer
  • One-Button Operation

Description

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

Brand: Hanna Instruments


Size: 7.5x5x2.5


Item Weight: 0.79 Pounds


Item Dimensions LxWxH: 7.5 x 5 x 2.5 inches


Number of Pieces: 1


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 7.5 x 5 x 2.5 inches; 12.64 ounces


Item model number ‏ : ‎ HI772


Batteries ‏ : ‎ 1 AAA batteries required.


Date First Available ‏ : ‎ May 27, 2016


Manufacturer ‏ : ‎ Hanna


Best Sellers Rank: #21,810 in Pet Supplies (See Top 100 in Pet Supplies) #46 in Aquarium Test Kits


#46 in Aquarium Test Kits:


Customer Reviews: 4.7 out of 5 stars 874


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Love it ! I will get the other Hanna checkers this one is so easy to use. No color matching!
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.
Reviewed in the United States on July 23, 2023 by Book Reviews

  • Everybody should have One
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. ... show more
Reviewed in the United States on June 11, 2021 by Michael T.

  • Never Going Back To API Testing
These things are wonderful! I will never go back to slowly dropping and counting again. Those API test you get at petsmart are about the same price as one of these. But I'm telling you will be happy you did it. They are a little on the pricey side. I've been buying the important ones one by one every few weeks and they work perfectly. I'm telling you, they're more accurate than the API ones, trust me. ... show more
Reviewed in the United States on July 11, 2020 by Nate92483

  • Follow the Instructions - great product
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. ... show more
Reviewed in the United States on July 30, 2023 by mando

  • Not sure
I’m a fan of Hanna and have never compared another test kit to the other ones I have but this one I did and my redsea kit test out to 8.7 and this is reading 10.5 so I’m not sure but it is consistent so that counts
Reviewed in the United States on May 16, 2023 by Steven B

  • A great thing to have!!!
Easy, accurate, and a must to own for anyone in this hobby.
Reviewed in the United States on October 15, 2022 by Nawaf

  • Works great
Works great had a issue with alk and calcium and this is helping me get it back in range better then the api tests I have everything is looking better
Reviewed in the United States on May 19, 2022 by Craig Ingle Craig Ingle

  • I love it
I have a hard time distinguishing the small difference in color with the normal test kits. This takes all the guesswork out of the equation. My readings are more accurate and I'm not asking others for their opinion on what the color is. Since the alkalinity is only thing that really seems to change much in my tanks (other than Calcium, but that's another story), I don't mind spending the extra money for this tester since the piece of mind that the readings give me is worth it. ... show more
Reviewed in the United States on September 11, 2018 by Dennis Mcgrath

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