Will probably swap out my 1.65bhp single-speed for a ~2.2bhp 2-speed (for the sake of saving some electricity by running primarily at low-speed) . A few questions-
I've currently got a 60sqft DE filter. On the current pump, I'm measuring in the ~70gpm neighborhood. I need to look it up but I imagine the filter has a minimum flow requirement, and at low speed (if I go low speed for an extended amount of time for daily circulation and filtration) I'll be well under that. Does this present any problems? Or will I just be less efficient with my filtration? I'm guessing the issue is the water will be concetrated in the lower half of the filter and I'll be operating effectively with a lower sqft.
I've also got a booster-driven Polaris cleaner, the standard 3/4hp pump. Any reason this can't be running at the same time? Will the Polaris be consuming most of the flow (which is fine as it's all going the same place anyway).
Is backwashing (when I don't do a full breakdown and clean) the only reason I'd need high-speed anymore?