Does anyone here have trapdoor snails? Can you tell me about your experience with them? I'm thinking of getting two for a 10g divided betta tank to control algae and uneaten food. I don't mind if they climb the divider and come and go as they please from one side to another, just as long as they keep the tank clean. What do you think? If you don't think I should get trapdoor snails, could you give me another suggestion?