In the interest of full disclosure, I'm a newbie.
Here are our numbers:
FC = 8
pH = 7.2
TA = 225
CYA = 45
As instructed by the builder, we kept the filter running 24 hours for two weeks. Actually, he said longer, but after reading this board we decided that was silly and we were reducing it. We were running the SWG at 20% because the FC was too high if we set it at 40%. The FC had been running around 3.
We decided to run the filter for "only" 12 hours yesterday and increased the SWG to 40%. Since we were going from about 20 hours to 12 and since we finally got our CYA up to a measurable level (it had been less than 30 for the 4 weeks we've had the pool), it seemed 40% might be good. Now the FC is 8!
From what I read, our target FC should be 1 or 2. Correct? There is no setting on our swg less than 20%. Do we just run fewer hours?
Re the pH and the TA, we are working on reducing the TA with acid and then aerating. When we started the TA was 300. The pH seems to go up rather easily. Is that a factor of the swg?
Am I right that the CH being low isn't a problem since we have a vinyl pool?