That's awesome actually, SF69, and the reason why we got our 2 clown loaches... they LOVE snails. We don't have apple snails anymore, the ones the CL's ate were the pest snails.
You don't want to feed the pest snails...they take over the tank. We have hundreds of empty pest snail shells among the gravel in our tank. Anyway, they live on the detrius in the gravel - which is why it's important not to let your gravel get too dirty. I guess it's all about keeping a balance in the tank - not TOO clean, but not TOO dirty.
Apple Snails aren't pests - you can buy them from the aquarium. If you have fish that eat snails, don't get Apple snails, get something else like plecos or similar.