Hanna checkers

[Mark 972]

Bad experience with the Hanna calcium checker! It registered 600 so we stopped dosing. After some advice from other people in the hobby, we purchased 2 other test kits - Elos and Salifert. Tested and compared and calcium results - Hanna checker was out of this world and other 2 kits matched at 420.

[Drfu]

Originally Posted by Oscar

And what about the Hanna nitrate device?

I am using Salifert nitrite test which is pretty coarse. Is the Hanna nitrate tester a reliable substitute?

Only for freshwater