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  1. R

    Moved to Cartridge Filter and new Pump - Opinions and Math Help Needed (Redux)

    After getting some help earlier this year, I think I might have messed something up. Equipment -: Installed a doughboy 18'x34' with ~7' deep end (~21K gallons) last year, replaced sand filter (silica II) with Pentair 420 cartridge filter and 2hp pump (20amp 115v) with a Pentair Optiflo 1hp dual...
  2. R

    Moved to Pumping Station

    Moved to Pumping Station
  3. R

    Moving to Cartridge Filter - Opinions and Math Help Needed

    Hi! After reading the forums for the past year, I need some help that I can't quite figure out from previous forum posts. Equipment -: Installed a doughboy 18'x34' with ~7' deep end (~21K gallons) last year, and it came with a sand filter (silica II) and a 2hp pump (20amp 115v). (1) 1.5" return...
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