🌊 Hanna Marine Alkalinity Checker HC - HI772: Accurate & Efficient dKH Measurement Review

Really cool. Fill vial with sample. Insert into the reader, press the button. Fill vial with reagent, turn upside down. read results. Really easy. However, it gets four stars for problems from all Hannas testers. Reagent closure tabs always break. And they should include a microfiber cloth.

This tester is essential for the reef hobbyist but I would recommend the manufacturer to reinforce the battery connector/holder that holds the battery in place. The first attempt to replace the battery broke it. Luckily I was able to put it back together and get it working.

Just received it today and it's great. I hate trying to decipher when the color changes on normal tests. I've tried to keep the alkalinity at 9.0 but it's hard to tell if it's 9.0 or 9.8 [precisely in as broad a range as I thought I was] I'm pleased To be able to report that I checked right away and it was 9.0! Checked again to be sure. 9.0 again. I highly recommend this product

Would never recommend. I bought it because it looked simple and was easy to use. The tester said it was 3.3 dch. I started taking more and more every day. Eventually things started dying so I decided to take them to the fish shop to see how accurate they were. DKH WAS 17. That's so high! I CHECKED THE DEVICE AGAIN AFTER THREE AND IT STILL SHOWED ME 3.3!

These things are wonderful! I will never go back to slow sinking and counting. Those API tests that you can get from petsmart cost about the same price as this one. But I say you'll be glad you did. They're a little expensive. I buy the important ones individually every few weeks and they work great. I'm telling you they are more accurate than the API, trust me.

More tricky to use than just dripping the solution into a vial, but should be more accurate. Used several times, then set aside until the Red Sea Alk Test Solution is used up. which is just faster and easier. The standard battery didn't make good contact, every time I opened the lid it turned off making it impossible to use as you had to open/close it twice to do a test (calibrate then measure). I replaced it with a new battery and everything was fine.

Trickier to use than simply dripping a solution into a vial, but should be more accurate. just faster and easier. The standard battery didn't make good contact, every time I opened the lid it would shut down making it impossible to use as you had to open/close it twice to do a test (calibrate then measure). I replaced it with a new battery and everything was fine.

This was my first Hanna Checker, I used Red Sea. It is easy to use and gives good results. It's impossible to guess when the color changed, especially when testing in the evening when it's darker. I place the test tubes in the checker the same way each time. Usually the gap is in the "fill to" line. Give it to me, make sure it's clean. I didn't have to use any fancy glass/lens cleaners, just a paper towel if there are visible fingerprints. then bam you get your results. No guesses.

This is my personal opinion. If you use this for aquariums. To calibrate the device, you must have a clean, unused RODI seawater solution on hand. So if you want to have a quick look, it's not that convenient. To a lesser extent, perform water changes and prepare new water. Then when you do a water change, you need to wait for the water to fully mix and settle. So it's not a quick check. Now you can mix solutions, but again it takes some time to transfer everything. So I would call us a test…