I am still trying to get a handle on everything that came with the pool that came with the house, and one of them is how long to run the filter. I searched the forum and got horribly confused with pressure drop and loss of head and all that.
So I thought about it and figured out a simple way. I moved the valves so I was drawing out of the spa and filling into the pool. I timed how long it took to go from spillway to top step. 9" in 3:30. The spa at that level has a diameter of 83". Then I just crunched numbers and came up with 60gpm. That equates to 3600gph, which means to get a full turnover, I need to run the filter 4½ hours/day. Hopefully this may help someone else in the same predicament.
Right now it's 3 hours a day, plus extra hours when I'm fussing with the chemistry or just brushing. And it all makes sense. When I run it those extra hours it does look sparklier. (Is that a word?) So the timer will get some adjustment. Is there any reason I can't get a second set of pointers and run half in the max sun and the rest in the evening hours?
I've already got the intake flows evened out; all it took was a diverter? - flying saucer looking thing - in the skimmer and some trial and error. Now if I sweep silt to the main drain, it gets sucked in! My next pumping experiment will be aiming the jets. I intend to make some zero buoyancy empty soda bottles and a good mix of empty ones and check currents in and on the water.