PLEASE NOTE: These snails will eat live plants!
An interesting freshwater snail to keep is the Rabbit Snail. Also called an Elephant Snail, a Rabbit Snail can be a great addition to an established community tank. Rabbit Snails are very peaceful creatures. They are not aggressive by any means, and they seem very curious about their surroundings. Rabbit Snails are active during the day and can be very active at night. A Rabbit Snail should be in tanks with sufficient size and water volume to support its life. Therefore, tanks that are 29 gallons and up are a good start. Keep in mind that Rabbit Snails, along with the other living organisms in a tank produce waste, so be sure to avoid overstocking. Tanks should have plenty of places to hide and explore.
A Rabbit Snail is a good scavenger, a ferocious eater and they seem very interested in eating some forms of soft algae growing on hard surfaces. Rabbit Snails also seem to be interested in eating decaying plant matter that has fallen to the bottom of the tank. But their diet should not be limited to the naturally occurring foods in a tank. A Rabbit Snail should also be offered food supplements, especially those rich in Calcium. Hobbyists can try things like bottom feeder pellets, algae wafers, and fish flakes for starters. Other food sources can be blanched green leafy vegetables such as lettuce and spinach, as well as blanched green zucchini.
Each situation will be different so try a variety to see what works. And be sure to remember that a Rabbit Snail cannot thrive simply on a diet of left-overs. They need to be offered a healthy, balanced diet.
Note Regarding Live Plants: "In general, a well-fed Rabbit Snail should not be interested in devouring live aquarium plants. It is said that an exception may be Java Ferns. Hobbyists often report that Rabbit Snails are interested in eating Java Ferns. But other than Java Ferns, keeping Rabbit Snails well fed on a balanced diet of green leafy supplements, as well as keeping them with plants like Anubias with strong, durable leaves, plants should be relatively safe."