Who Gives A Fish Forums

Before you change anything, test your magnesium. If it's below 1250 ppm, no amount of calcium dosing will help. I've seen tanks where the owner was dumping calcium daily but didn't realize their mag was at 1100. Fix that first, then reassess.


This. So many people sleep on magnesium, but it's ...

Kalkwasser in the ATO is the move if you want a low-maintenance option. Just make sure your evaporation rate is consistent, or you'll get wild swings. My 60 gallon mixed reef stays rock solid at 420 ppm calcium, 8 dKH alk, and 1350 mag with this setup.