Why are all of my clams dying???

[TimT]

Is anyone dosing Iodine to their systems? Clams and corals need it to detoxify radical oxygen produced by Zooxanthellae. Iodine is rapidly depleted in a reef system.

Has anyone checked for copper in their water?

If your Ca drops below 380 your chance of issues becomes huge.

Phosphates over .16mg/l and they begin to have issues as well.