I noticed a few rust stains a few months back. I thought my husband sprayed some fertilizer pellets in the pool. The spots look about a 1/4 inch in diameter. Now I notice more closer to the main drain, and we have not spread any fertilizer. I have tried brushing, but this did not help. Any thoughts what this could be
Test results today
FC 3.4
CC 0
PH 7.8
TA 70
CH 270
CYA 50
Borates 50
I have been using 10% bleach in case this has any impact
Test results today
FC 3.4
CC 0
PH 7.8
TA 70
CH 270
CYA 50
Borates 50
I have been using 10% bleach in case this has any impact