Alright, so it was recommended that I get a snail (I think "ramshorn" it was called... I should just check that post again, but I'm lazy right now) to help control some excess plant growth I'm having in my tanks. What do I need to know about taking care of a snail or multiple snails? I only keep crayfish, shrimp, feeders and one really big oscar... so snails are a loss on me.