Clam under attack!

Is there a chance that you could take pictures of what you are referring to, so that we can see what it looks like. From there it is possible to better answer your question

 

Just checked on him at lunch. He's a goner. He's 75% detached from the shell. From the bottom too. No snails of any kind near him tho, i guess he's still alive. Poor fella.

 

Bummer.

Once they start to go like you described it, there is nothing you can really do.

 

Sorry to hear, you can remove the clam or leave it for the CUC.

 

I am running both an always been. Are you not supposed to use those at all with clams in tank?

 

There is some literature that suggest that use of these products when used or replaced often hastens the progression of PMD (pinch mantel disease).