Ok I put a regular clam that I bought at albertson in my tank to feed my mantis shrimp. It has been a month now and it is still alive and I check it eveyday as I know if it dies you want to remove it so it doesnt mess the water up. So my question is more of is the clam good for the tank? Does it do anything for the water like filter it? I dont know alot about clams so just looking for some info.