My question is...I couldn't find a fish that had died in my tank and when I did find it, one of my Apple Snails was eating it. So, is it ok to leave dead fish in the tank for the others to eat? Or should I try to remove them? Also-the snail just left the fishes 'shell' and kinda sucked out the insides (sounds really gross, but it was neat to watch the snail eating the fish). Thanks!