I am looking at using solar panels on by 15' Intex pool, so I have the same dilema. I have found 4x8, 4x10 and 4x12 panels that might work better for your size pool. Now if I could figure out which one was the best one to buy!

Smartpool sunheater:
http://www.waterwarehouse.com/produc...0__id-151.html

Solar Bear Junior Disc System
http://www.fafco.com/WarmWater/FAFCO...-details.html#

Enersol Solar Pool Water Heating Panels
http://www.northwestwholesale.com/pool_solar_panel.asp

EZheat 12
http://www.solartrope.com/new/ezht.htm