Without reading thru all the posts again it seems as if I saw mention of buying a larger unit than the advertised capacity which is based on 100%. 100% of what I don't know. If I'm wrong correct me I think Poolsean in one post said everyone advertises this way. So all this to ask if I have a 32000 gal pool should I buy the "60" so the percentage is lower? I think the lower % gives longer cell life but I don't know why. The purchase price between the "48" and the "60" depending where you go is 1-200 dollars. Thank You in advance.