I currently have a 12,000 gal. in ground pool which I'm having refinished and a new pump installed. The old one is 16 yrs old with a new 1.5 HP motor that's 3 -4 yrs old. It appears that 1/12 ping was used under pool.I also have 7 4' x 10' solar panels on the 1 story roof.
MY question is what size pump will handle this? Some pool refinishers have said 1.0 hp is enough, and some say 1.5 is better. Which will save me money and operate efficiently? Currently my cartridge filter runs at about 14 psi.