I need a lot of information on snails.first should I get just one snail. I like to have at least two of the same species of everything so they don't be alone. Second how do I make snails happy. If I do have only one snail I'm sure it would be stressed and uncomfortable. If one snail is the best way to go how could it be happy third if I have two snails and they mate what fish will eat just the eggs and not the parents