My 10 gallon tank all of a sudden popped up a BUNCH of tiny snails. I have no idea where they came from because the plants I added, I added in October. I just noticed the snails this week. There must have been a couple and they all of a sudden multiplied a lot. But how do I get rid of them? At least some of them? They're everywhere. Don't want to hurt the fish though and the fish are too small to eat the snails.