I have 3 issues at once & I would like to know which one to battle first.
Don't want to just dump a bunch of different Chemicals in at Once.
I need to Shock It. Calcium Hardness is Low. PH is High.
FC 3 (Algae growing on Pool Walls)
Calcium Hardness 80 (20' x 40' Gunite Pool: Should Be between 150-200)
Thanks in advance!