Apple snails will eat plants, and animal matter. I've heard of them getting trained to eat fish food, but mine eat mostly algae, and other plants I have in my aquarium. My one snail sometimes even eats my catfish food, and the catfish arent happy. Apple snails are perfectly fine with 1 tablespoon of aquarium salt per 5 gallons of water which is what I have. My snails have bred in these conditions. Their shells will disolve in soft water, and keep the pH from 6.8-7.2. 6.8 if you don't have biological filtration (bio-wheel), and 7.2 if you do. If you want your snail to be more active, turn the temperature up to 76 degrees. If you want less active snails, but a longer life span, turn the temperature down to 68 degrees.