Ok, so I want to start a small snail tank on my desk at work. I'd like to do MTS, Nerite, Trapdoors, and maybe some other snails (and possibly one assassin snail later on to help keep population down). Two questions arise. 1. I have access to both a 5 and 10 gallon tank. The 5 gallon was my first thought, but is it big enough for a gazillion MTS and several other varieties of snails? 2. What other snails could I put in this tank? I'm looking for a variety. And this tank will be lightly planted (fed well enough that the snails hopefully don't eat any plants). So I don't want any snails that make plants a meal normally.