be sure to place the snail in a fresh water tank, for starters. But snails eat algae! You know, the green stuff that grows in your tank? they have a special thing called rahh or something that allows them to eat plants. If you have more than one snail, be careful! The snails can quickly breed and overrun your tank! but if you keep the water levels high, they'll be less likel to breed. Also, fish can eat the snails. but anyways, leave your tank in the sun and the snail will eat the algea. Don't let too much algae grow! also, i think my snail eats some crud on the bottom of the tank.
leaves!
there in water
leaves
you would want to feed it an algae or vegetable tablet that you can get from the fish store. feed the snails once a week and they should be good.
Slowly.
I have a large apple snail, about a baseball size. I feed it only with Romain lettuce. It survives well.
leaves
Algae, so you don't really need to feed them as they "feed" themselves.
feed it
Nope.
vegetables, tomatoes and lettuce DO NOT feed your snail citrus
Twice a day