steve8855

I have the calcium Hanna checker also an have had the same problem. It is a pretty common problem and Hanna solution is that you need to get distiller water with no calcium in it otherwise it throws off the reading. I do not use it anymore because I can't be sure that it is accurate. It can try the distilled water and see what you get.

ya ill give that a try if i can find it never see water like that befor at the store.

Can i ask what test kit you use for calcium?

mccoy took my words, make sure you are zeroing with RODI

watch the end of this video http://www.youtube.com/watch?v=4v5-FPMQRYY

I now use red sea and I have had no problems with it

ok i think ill buy that one so i can double check my hanna results and see how that goes