So, Sir Lefty has decided he likes algae wafers. Now I have to leave my snail in a cup of water, floating in the tank overnight. Why? Because snails are slow eaters, and I can't stop Lefty from eating the algae. So my snail is in the cup with a broken up algae wafer for the night. I left about half an inch of the cup empty so he can crawl out of the water if he wants to. Annoying, but necessary.