Burner of the Tips
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Reef Tank 365Build Thread Contributor
I barely worry about cal. I test maybe monthly to make sure it’s somewhere near 400. I test alk every couple of days though. I have never had a tank that drops Calcium in the same fashion as alk.I am actually running into something similar as you. My calcium levels don't appear to be dropping linearly in my tank yet my alkalinity levels follow an even slope.