Was going to include some clams in my feedings just to mix up some diets. I see some people use clams in the half shell and others the entire thing to prevent them from flipping over. makes since. My question is how long should I leave this clam in the aquarium. Surely there is a limit to this before it becomes a bit nasty and breaks down. Also, ..do you cut the flesh up a bit or leave it in-tacked. thanks