Had a stopped Ca pipe, no Ca dosed for two weeks. Suddenly some snails were dying and even the big sea star died.

Measured the water and had Kh at 13 and Ca at 250. So made a big change of water and dosed a lot of Ca immediately.

Two days later the water was at kH 9.2 and the Ca at 225.

2017-06-15T06:41Z[GMT]