I don't believe the clam was very healthy over the last 48 hours it was not opening completely. When I came home from work last night it was lying on its side and I propped it back up. It opened maybe a centimeter.
No possible way, well small chance anyway that it was a worm. I used pest free dry Marco rock to set up the tank.
All corals go through a strict dipping and QT process before going in DT.
Nothing has vanished from the tank.
I have not yet put the 200 snails in yet, they arrive tomorrow morning and will be in DT for 3 days before going in either tank or the extras being sold.
Last night around 3 am I did wake up and check on the tank and did see both cleaner shrimps and probably 4 of the 8 hermits in the tank hanging around up in the clam bed.
I think the hermits and shrimp did a little disease control for me.
I was just shocked they did it soo quick.