I'm finally installing a Pentair Cartridge filter/optiflo pump (340077 2hp/spd) combo (PNCC0150OP2160). I'm trying to calculate run time on low speed. Where can I find the Pump Curve info for this pump? There is one in the manual, but I cant tell if it's for high speed or low speed. I know the 2hp pump seems like too much pump, but in discussions with several TFP members before my purchase a couple years ago it was determine that, because of the way HP was calculated by Pentair, it's actually viewed more like a 1hp pump..