After having pool re-plastered 3 months ago I just noticed a stain. (See Pic). What caused this and how to get rid of it?
My numbers have been right on the money since re-plaster and I brush twice weekly and treat it like a new born baby. No iron or copper detected with test strips. The stain resembles Abe Lincoln's face somewhat, haha Thanks!!!
Numbers:
FC 3.0
CC 0
PH 7.6
TA 80
CH 275
CYA 40
Borate 35
Temp 92 degrees
My numbers have been right on the money since re-plaster and I brush twice weekly and treat it like a new born baby. No iron or copper detected with test strips. The stain resembles Abe Lincoln's face somewhat, haha Thanks!!!
Numbers:
FC 3.0
CC 0
PH 7.6
TA 80
CH 275
CYA 40
Borate 35
Temp 92 degrees
