| I'm using a Red Sea Calcium Pro test kit that is well within expiration. I haven't tested it with a different kit (thought I should).
A guy at the LFS convinced me to purchase a certain type of rock that I put into my sump. He said it released calcium on it's own and that he had never had to dose. I con't remember what the name of the rock is, but it's just a white LR looking stuff. |