this may sound retarded but i lost a fish ! i can't find it anywhere, and now two other fish have dropped dead this is a well established group of fish slowley growing into larger aquriums i haven't recently added fish my chemical levels are just fine no sighns of ick and they are not incompatible fish so whats going on? is it possible that the missing fish is dead in there causing problems for my other fishie freinds? i have looked everywhere in a 29 gal aquarium but don't really want to mess with the enviroment to rip it apart and look for fish! also would like to know the name of round shell snails that are slow growing ...had two for some time and one passed but am hesitant to add another of diffrent breed or on that will over populate my tank...don't want fifty but love having them in there they are fun to watch ...