I said to hell with it and threw quite a bit of the snails in. I figured I put wild fish in there sometimes so why not a few snails. One was undercover though. He happened to be a blue legged hermit crab. They clean good, but I don't want any of them. The kill your snails and each other for their shells and I don't want that kind of looting and killing going on in my tank(LOL). I kept him out. If the others don't do their jobs either, I will take them out also. I'm not going to let them poop in my tank for free and not eat the stuff they were put in there to eat(LOL) We'll see how it goes. It will be really easy to get them all out how my rocks are aquascaped with big spaces etc...