I have been following TFP methods for a few months now. I check my water nightly (wife thinks I am nuts...) and add chlorine daily. My CYA is around 25, and since I am scared of an algae breakout, I maintain my FC level between 5-9. I have never let it drop below 4. My CCs are 0. pH is 7.5. It increases almost weekly and I add MA. I scrub the pool weekly. Filter runs from 9am-9pm and from 2-3am. Polaris runs 2 hours twice a day. Water temp is around 84.
My issue is, this week, I ended up with green algae growing on the sides. Very fine, but noticeable and water was a tad cloudy. I ended up scrubbing the whole pool and raised the FC a bit more. This is the second time this is happened to me. Last time it after scrub and a vacuum, all was good.
My question is, what am I doing wrong? Bad circulation? I believe I have good flow, and filter runs 13 hours a day! (way too much, I know, but I was thinking I have a circulation problem). My daily FC loss is minimal with the sun and number of kids swimming in it (2-3) I pass an OCLT test. Do I need to scrub more often? I really do not want to maintain a higher FC, as I already think it is high. I tossed in the floater yesterday with two pucks, as my CYA is 25, and it could be a tad higher as temps are hitting 100+ here.
Any feedback is appreciated. I feel like I am doing everything by the books, and it gets depressing when I got home from work and pool had green on sides!