I have few spots of mustard type algae that are popping up in a few places around the pool. Mostly in the spa and bench areas. These spots brush away quite easily but I am wondering what is causing these to continue popping up. I have not had this issue the last 2 years.
From Test this morning
FC = 2 (Target 5, adding bleach daily)
CC = 0
pH = 7.6
TA = 60
CYA = 40-50
I have never shocked the pool, as I have never had any combined chlorine or previous algae issues with the pool - Thanks TFP!
I am wondering if I need to shock or if I need to just adjust my target chlorine level up given my CYA.
Thanks in advance for your input!