I agree about the nerite snail. They can be great cleaners. I say "can" because I have two, and one devours algae and will eat all the algae in his section of the tank (It's a divided tank) while the other nerite in the other section just leaves little squiggly lines through the algae. lol
But they don't get big and they have a low bioload compared to other types of snails.
You might be able to find them in your area. It took me a while but one day I just called a bunch of pet stores/fish stores in my area and found a place that sold nerites and had them in stock. One place I called said they had them in stock but then she said, "Salt water, right?" and I said "no, freshwater." So she said, "No we don't have any." So make sure you specify freshwater if you're calling local stores to find them. But ebay works too... you'll just have to pay for shipping which can get expensive for living things.
Last edited by OrangeAugust; 01-31-2013 at 02:49 PM.