Thanks for the reply mas985 and oops on my part. I meant to turn over the pool twice in 24 hours or once every twelve I guess I just didn't proof my post..

I'm thinking that a good way to size a new pump is to calculate the gpm necessary to turn my pool over twice in about 20 hrs, make the best estimate I can of the total head of my plumbing at that gpm and buy a two speed that will do it on low.

I figured that I could cut the CYA down because I'd be constantly chlorinating.