I've just recently found this website and converted to the BBB method. My pool looks the best it ever has BTW. My question is, there are several spots that are tinged in yellow, mostly around the steps and the shallow end. I'm trying to decide if it's mustard algae or just stains from algae outbreaks I've had in the past. Latest test numbers:
FC - 7.5
CC - 0
PH - 7.6
TA - 12
CH - 340
CYA - 60
Can I have mustard algae and still have a CC level of 0? As soon as I got the TF test kit I shocked the pool to normal levels and the water is crystal clear, but I'm wondering if I need to shock up to MA levels.
Can't tell you how much I appreciate this site!