Left work before finishishing the post

Let's say the discrepancy on ATI test kit is 10-15% and we do a test for mg and cone up with 1000 ... After we factor in the 10-15% discrepancy that water can be 850-1150 mag when your target is 1250-1350..

At this point you might be as well guessing

Have you tried the Hanna Calcium checker yet? You might change your mind! :p

I agree though, I wish all kits were like the Hanna Alk and Phos kits. Potassium would be a break through.

He he, I did my homework on that and potassium would be amazing if it was a Hanna chlorimeter but my understanding is that it can't be made that way.

New season
 

hey again, so since I originally posted this topic I have purchased a bunch of sali test kits, Hanna phosphate test

Upgraded my dosing chemicals to the highest quality crystals I can get

Things are growing and stable

Just need to swap my calcium tester, which is the absolute best ?

Hanna?

Good on you to spare no expenses and being proactive.

I used to use API Ca test but upgraded to Red Sea, much easier to read/do. I have no experience with other brands but most should be fine IMO (not API).

My favourite Ca test is Elos, but J&L don't carry it no more :(

Reef Supplies carries Elos.