I haven't gotten my aquarium yet but I'm just curious about snails. I haven't found many articles on them on FishLore so I thought I'd come here to ask a few questions regarding them: 1. Do snails harm the aquarium in any way? 2. Are snails beneficial to the aquarium in any way? 3. Is there any reason I should buy a snail? (I want one, but beyond that is there anything else?) 4. Do they bother the fishes and do the fishes bother them? Thanks for helping! I'm completely new to this hobby but I really can't wait to get started, but before I do I want to do AS MUCH RESEARCH AS POSSIBLE!