I run my filter on low during the day and then turn up to high when I add FC and leave it on high all night. When i get up, its just part of my day to turn it back on low. I probably run it too much, but it doesnt bother me at all.
And to answer an above question, My CYA is a little lower than 50-60. I need to shoot for 50, but this late in the year, i'm just going to keep going like I am. Next year i'll shoot for 50. I get Full sun from about 8am-7pm roughly. No trees around.
Two days ago I messed up my FC test and overdosed and had a FC of around 9.5-10. One day ago, it was 7.5. Last night it was 6.5. I havent added FC in 3 days. Have had swimmers last 2 days. I thought that was pretty amazing to not have to add for 3 days and swim 2 of them. I'm sure i'll have to add tonight though.
And I get mine from Ollies...12.5% for $2.99. Cant beat that.
And to mrogers, my pool was 85 last thursday. Rained sunday and monday and was cold the weekend. Highs didnt even hit 70 one day. Water temp was down to about 76-77 Monday morning. It was 79-80 Monday evening when i swam and that video was taken, and it was 81-82 yesterday... 77 is pretty cold for me. 79 was chilly, but it felt good after I got used to it.