bivalves

Hello everyone! A fish shop in my town has a clam in stock and—I am considering adding it to my tank. However, have been told that bivalves are exceptionally difficult to keep alive. I know they need phytoplankton and good water conditions (such as Calcium). However, I am weary about the...

I have seen lots of posts about using these as food -- but I am curious could these bivalves from the store survive in a sump / refugium? More of a curiosity than anything.

Hey everyone, this is my first post! I have been searching quite a while for mussels/ mussel cluster, or other unusual bivalves. That being said, does anyone know of any sites that sell them? Thank you very much for your time! IF YOU HAVE SOME IN YOUR TANKS SHOW'EM OFF, POST THEM BELOW!