I have sand for my substrate and looking for some snails to burrow into the sand to keep it from forming gas pockets. I have heard MTS snails reproduce very fast and not really wanting my tank being over run by them. I have heard you can add some assassin snail to eat the MTS. So say the assassin snails end up eating all the MTS will they die off or will they continue eating algae and left over food. Or is there a species of snail that does not reproduce at alarming rates? Any feedback is appreciated.