Dwarfs
Fish Connoisseur
Trumpet snails are great! I have a few hundred in one of my tank, and I am trying to start populations in my other tanks (55g's) The only two problems I have with getting them to settle in those tanks are a 7" severum and 6" Uaru 
These snails keep food from rotting and are very good to have in sand substrate tanks

These snails keep food from rotting and are very good to have in sand substrate tanks
