i dislike having tons of pest snails on my glass. even in a non-show tank it makes the tank look lame. I do love snails though. especially my sulawesi snails. i dont mind having those all over my glass haha. the less pest snails the less competition for my tylos and the more breeding i get. which is why i pick out pests from time to time to lower the competition for the good snails. otherwise the baby tylos dont get enough food to make it into adulthood.