How long to run pump & at what speed?

[chem geek]

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.

I thought that the conversion was 2.3 feet of water per PSI so that you would multiply PSI by 2.3 to get head loss in feet. Am I missing something?

Richard