Whats wrong with my Clams?

[christyf5]

Originally Posted by zoaElite

No coincidence here, pinched mantle is though to be brought on by a protozoan similar to Perkinsus olseni .

And since you don't do water changes, you've created quite a little breeding factory/protozoan soup. Just one or both may have been infected originally but once one got going, the second was surely to get infected.

Don't be fooled by the clam looking better after the first dip, you'll likely have to do several FW dips over the coming weeks.