I have noticed, what I thought was dirt, some slippery light brown slimy stuff, that brushes easily-some sort of algae- It's a pretty new pool but here are my numbers-
Salt water Pool, vinyl, 27,000 gallons
1.5 TC , 0 CC - Has been holding strong at around 3.5 in our hot 95 degrees days- getting a lot of rain lately though. I turn my Autopilot off from 10 pm till 8 am. From there its on high spd till 6p, then low speed til 10. Maybe I should run pump 24/7??
180 TA- (I know, working on it)
7.8 PH- Just added acid
CYA- 40 (working on getting it to 70)
I didn't think algae would grow with 0 CC, but obviously it can- verified with TFT-100 test kit FAS-DPD
I just threw in 3 jugs of bleach, and 3 qts of acid, and 6 pounds of CYA