How long to run pump & at what speed?

[mas985]

Pump run time should be based upon turnover (i.e. how long it takes to pump the pool volume). Turnover can be difficult to determine accurately but you can use a few rules of thumb to determine it.

First you need to determine head loss. In most pools that is between 45-65 ft on high speed and 11-16 on low speed. Or you can calculated it from the filter PSI reading. Head loss is usually 2.5 to 3.5 times the the PSI reading. I would use 3x.

Next look up the flow (GPM) on the pump head curve for both high and low speeds. Low speed should be 1/2 of high speed GPM. Low speed head loss should be 1/4 of high speed.

Then determine your turnover rate.

Turnover (hours) = Pool Volume / GPM / 60

For low usage pools, 1 turnover is usually enough. For high usage pools, two turnovers may be required. Most of the swim season, I run mine 1.5 turnovers.

Given your high HP pump and low volume pool (15000 g?), my guess is a turnover < 3 hours on high speed and 6 hours on low speed. So you probably don't need more than 6 hours on high speed or 12 hours on low speed.