It went from 55 to 76 in 2 days - with air temp > 80 in Western PA. I just installed Saturday. My pool is about the same size as yours.

The install was trickier than I originally thought -- (meaning planning the layout and getting all the right parts).

tphaggerty recommended a site call www.powermat.com to gain an understanding of what is involved -- it is really worth the time to read up on them. I bought from solartrope - before gettting information on that site. Powermat does a much better job explaining things. Next time around -- I'd consider paying a little more for a dealer to install -- but there are no dealers in my area that install solar.

I still have to go up and replace some parts that I did not originally order -- ( I did a make shift fix to split the panels to get them working.) I spoke with the dealer today -- he told me the same fix as tphaggerty did to lower the vacuum on the return line. He said the too much air is a common thing.

Best of luck.