I've already done research on which pool to buy, now I need to decide what size. My husband said to get the 30' and I wonder if the 27 would be better. We have 2 kids still at home and several grandchildren nearby, not to mention all of the neighbor kids. I wonder though if the larger size would warm up with sun power only as well as the smaller size. Also, how much more chlorine would I be going through? There's 20,000 gallons in the 30' and 16,000 in the 27'. Any thoughts? The salesman said not to many people buy the 30' because it's "really a big pool." Does anybody else have this size and how do you like it? Thanks for any help, Denise