fbm
Active Member
I am using instant ocean salt and my calcium is 260ppm and I have been dosing for calcium and it still wont go up. Noone locally can test for magnesium, but I am going to start adding magnesium to my system. My question is will I see the calcium come up as the magnesium comes up or will I still have to dose for calcium? Or could my tank be using up calcium that fast? I have mostly base rock that is starting for form coraline algea now, so could the algea be using it up real fast?