3/4 acre with 30 foot depths sounds like some steep banks! should be a beautiful body of water, I know nothing about aeration but hopefully some professionals on here will chime in with some helpful advice. What little I do read on here about aeration I would assume you wont want your diffuser down at the thirty ft depth but I'm not sure. Good Luck, commenting on here to bring it back to the top to catch the eye of someone with more knowledge of aeration.

All the really good ideas I've ever had came to me while I was milking a cow.