This whole discussion gives me a thought. I have a perfectly viable 1 1/2 hp pump on my pool.
The only time I need any where near that much pump is for vacuuming. My pool is covered and is very well serviced by a half hour a day all winter long.
It occurs to me I could simply add a small pump to the system with a suitable check valve to run the filter and then use the big pump only a couple of hours a week to keep it clean.
The rub however is I don't think there is anyway to buy such a pump. What I would need would be something equivalent to a variable speed pump runnig at around 1000rpm. Maybe 10 or 15% of a one hp?
But it looks to me like such a pump does not exist.
Anyone think of one? Maybe off a small above ground or such.