I am 6-weeks into a SWG conversion. I have spent the first couple weeks playing with filter run-time and SWG percentage. I had it at 7-hours run time at 35%, with FC staying between 4-6. We had a hot week two weeks ago and got some algea and FC dropped to 3 when I tested. I have since raised it to 8-hours per day and 40%. I now have FC at 8.0 after a week of that (but it was cooler).
I believe I need to lower the PH. I know i should be using Muriatic acid, but I still have some dry acid, so I figure I will use that up and then switch. I also believe I need to raise the CYA (was at 70 when I converted, and has dropped with rain and water additions).
I see some people need to do weekly acid additions with SWG pools, and some people never do. I would prefer not to do this. Do I need to add Borates to accomplish the lower maintenance of the PH?
Also, I follow the pool school methods with two exceptions (full disclosure). I use non-chlorine shock when needed to remove the combined chloramines instead of super-chlorinating. It works and I don't mind spending the money since it is easy. I also control the phosphates in the pool (which Pentair does reccomend) with natural chemistry products.