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.

[ALang]

I thought that weekly small water changes would take care of iodine?
I really hate to add chemicals to the tank that I cannot measure, how does one know if we add enough? How much should we be adding?
I am looking forward to antoher clam this next little while, and I really want to make sure that the fella will be OK in my tank.

[doch]

Yes, I dose Iodine... I don't test for it, but I does the 'beginner amount' that is stated on the bottle... this on top of my weekly water changes. I do feed phyto on occasion... maybe a bottle every month or so... just kind of when I happen to remember to pick it up. I also dose KZ sponge power. ALang, I'm waiting on the same shipment, and in the same boat! I'm thinking that my tank in Fort Mac will be a better clam tank anyways. I can actually see past the penant on the top to see the clams glow. In Edmonton my fixture is so big I can't see anything from the top except during water changes.