Just an update.. I got the phosphates down to zero and SLAMed last weekend. The SLAM was pretty short as I never failed a OCLT or used a ton of FC during the day, but I did find some hidden algae at the waterline in the interface between the plaster and waterfall rocks. It is super hard to see and harder to brush that area. Now the SWG seems to be working again, though not producing the FC that pool math says it should be. DSP advised me to just run it at 100 percent to avoid any cycling. I guess I thought the percent correlated to how much the cell was producing but it just causes it to cycle on and off for that percent of time. You can definitely see the bubbles/light fog when the cell is producing, and the amp/volts are in the ranges listed in the manual.
I also bumped my pump up to run 10 hours a day instead of 8, which I do anyway in the summer. I guess i just thought I would make enough FC to leave it at 8 with the new SWG. I bought a phosphate test so I didn't have to mess with leslies anymore. The salt was a little low at 3200 so I got it up to 4000 since Circupool recommends 3500-4500. That Dang leslies phosphate remover did raise my filter pressure, so I cleaned the cartridges and found a ton of debris in there that my skimmer socks usually catch. I am going to test every few days and see what happens since we are now getting 90 degree days and lots of sun here.
I am still using about 3-4FC on hot days which is what I used last summer with 40-50 CYA and bleach chlorination. I thought I would use a little less FC with the higher CYA required for salt pools. We shall see.