My Fiberglass pool always has a small amount of algae on the gasket area of the 2 inlets, vacuum port, 2 outlets, and skimmer.
Basically anywhere there is an entry/exit through the shell. It's always there, I brush it off and it grows back.
The pool water is ALWAYS year-round crystal clear, and the current numbers are:
FC = 4
CC = 0
PH = 7.4
CYA = ±45
TA = 60
Water Temp 73º
Two weeks ago I did the annual Super Chlorinate to FC 13, CC 0, at the start of the swim season
What is this algae an indicator of? How do I get rid of it?