I've recently noticed patches of brown spots on my pool bottom in the deep end. Neither brushing nor vacuuming remove the spots. My current readings are:
FC: 10.5
CC: 0
pH: 7.2
TA: 210
CH: 380
CYA: 90
Does anybody have any idea what the spots might be and how I can get rid of them?
FC: 10.5
CC: 0
pH: 7.2
TA: 210
CH: 380
CYA: 90
Does anybody have any idea what the spots might be and how I can get rid of them?