Thanks alot u guys. I'm getting it dug in a couple of months and not putting fish in untill spring so I got plenty of time. I'll keep you all posted and let ya know how deep when he builds it. I know he said my dam would probley be 20 feet. I'll ask. When the time gets closer. Yes I am going to aerating it but don't know what kind of one to buy. Thanks for all the help so far