Spa will be used only by my family of 4 people daily with 78F water for swimming and exercising on a underwater bike.
It is 7'Wx11'Lx4.5'D fiberglass over wood swim-in-place (with a harness) indoor, 1.5-0.5 KW Pump, 1.5" plumbing, 220v heater, Ozone generator, 2x50 sqft cartridge filters, Spa...