We have a brand new pool and about 2 weeks ago a brown spot showed up on one of the ledges. I brushed it and some residue ended up on my brush. I showed it to the PB and he said something organic maybe fell in. He squirted some MA on the stain and it slowly faded. Eventually the first stain showed back up but I've been dealing with too much FC so I haven't paid much mind to it. Now this morning I walk out to the pool and I see a second stain in the shallow end this time.
What do you think this could be? I don't think it's algae because I've never been out of ratio on my FC/CYA in fact I've been too heave on FC.
FC 11
PH 7.5
TA 110
CH 325
CYA 80
What do you think this could be? I don't think it's algae because I've never been out of ratio on my FC/CYA in fact I've been too heave on FC.
FC 11
PH 7.5
TA 110
CH 325
CYA 80