Any thoughts on who has the best Cartridge Filter system in a 150 sq. ft. with a 1.5 hp, 2 speed pump. I am ordering a 18' x 40' pool and would like to try a cartridge system but can't find many online with 2-speed pump motors.

I did fint a Pentair Clean & Clear with Optiflo pump, 150 sf. 1.5 hp, 2 speed, Model number 5626800 but can't find a price on it anywhere. Found on Pentair website.

Surley Hayward or Sta Rite makes one.

Other question, who make the best cartridge filter system.

Thanks,
Aranon