My
LFS recently acquired two apple snails. I don't mean the mystery snails that get golfball size (I have two of those

), but the kind that gets, well, apple size. One of them is about 5 inches high in shell, the other is about 4 inches shell height. I'd post their latin name, but it's escaping me atm.
Anywho, I know my little mystery snails are poopy little critters. Any guesses on the bioload of these giants? How many gallons of water each would you wager they need in terms of bioload? Also, I know my mystery snails are zippity as all get out. How big of a tank do you think a snail that size would need to roam about and feel comfy?
I'm thinking 40-55g. Does that sound right? Larger?
Thanks!