Unfortunately, the tank is probably overstocked already. It is our first tank, and I think we went a little overboard on fish. Right now, there is 3 Dalmatian mollies, a sliver molly, a golden molly, some kind of a catfish(

), and three white skirt tetras. There is also a plecostomus but we bought him with our very first set of fish, about 2 months ago, and no one told us how big they would get. We are now buying a 75 gallon tank (in addition) and plan to move it to the larger tank once it is set up and cycled. Now we just need to replace it for alge purposes. I think that the idea of the snails is a good one. That may be the way to go for us. Thank you very much..