Just started noticing this stain on the pebble, started in the past 6 weeks or so, only in shallow end, but there are 'trails' heading to deep end.
Color is greenish- brown, I thought it was algae at first, did OCLT, no loss. Tried sweeping and scrubbing, and it doesn't come up, doesn't float, doesn't seem to move at all. We've never had any metals problem, so haven't tests in the past 2 years. Stain is around the bottom edge where floor meets wall, around the shallow floor return, and edges on bottom 2 gunite steps.
It won't vacuum, Pool only 2 years old, next step call pool builder?
Water tests yesterday posted below. Calcium has been climbing, we have hard water, even using softened water to add. I've read here no issues with having high CH. According to poolmath spreadsheet, CSI has always been in the green
Chlorine 14
pH 8.2 (added acid to reduce)
CYA 70
TA 70
Cal Hardness 550-600
salt 3400
Hoping the great folks here can point me in the right direction.
Pictures show area near the floor return, and also one of the 'trails' from the middle of the pool
Thanks much
Color is greenish- brown, I thought it was algae at first, did OCLT, no loss. Tried sweeping and scrubbing, and it doesn't come up, doesn't float, doesn't seem to move at all. We've never had any metals problem, so haven't tests in the past 2 years. Stain is around the bottom edge where floor meets wall, around the shallow floor return, and edges on bottom 2 gunite steps.
It won't vacuum, Pool only 2 years old, next step call pool builder?
Water tests yesterday posted below. Calcium has been climbing, we have hard water, even using softened water to add. I've read here no issues with having high CH. According to poolmath spreadsheet, CSI has always been in the green
Chlorine 14
pH 8.2 (added acid to reduce)
CYA 70
TA 70
Cal Hardness 550-600
salt 3400
Hoping the great folks here can point me in the right direction.
Pictures show area near the floor return, and also one of the 'trails' from the middle of the pool
Thanks much