
Vanessa in Michigan
What do you have currently in the tank? Plecos get very large. I've seen some at 24" long. You should probably be shooting for housing fish based on their full grown sizes. Shipping fish is so expensive. If you have a local fish store, that would be the better way to go by far.
If you spend about $20 on livebearers, you should have plenty of fish in a couple months. For snails, PetSmart carries Mystery Snails, but I don't know what else you have in the tank. They might get eaten.