hey dont fishes eat snails? and if i get liek 20 snails and throw it in my tank u think theyll keep reproducing and my fishes can have a tasty meal from time to time or is that a bad idea.
In my experience the real question is how to keep them from reproducing. As long as you leave them alone to do their own thing you should have enough snails to fill a million tanks. Just throw a piece of microwaved spinach (microwave it in a cup of water to make it easier for them to eat) in there once and awhile and they will do the rest of the work for you.