I am looking to get rid of these stains on the deepest end of the pool(pic 1 and pic 2, different angle), they have been there for 2 years after i bought the house. Regrettingly, I did not pay attention to the pool chemistry as much in the past. Now I am looking to get better at it.
So far, i have tried rubbing vitamin C tabs (did not take it off), rubbing trichlor tabs (does not take it off initially, but if I leave overnight on the bottom it does, I know now I am not supposed to, but I assuming it worked bc the trichlor tab is slightly acidic) and finally with Jack's ID stain, the treatment 2 (sulfamic acid) takes it off completely.
This suggests that it is likely copper/calcium stain, I do have some calcium scaling around tile by the water surface and some where the hot tub spills over to the pool. (pic 3)
The pool chemistry now: with taylor K2005C test kit
FC 5.0
pH 7.4
TA 80
CH 800(yes i know I recently did several cal hypo shock and will be using liquid chlorine from now on), our water from local area is 350
CYA 60
CSI 0.16
The stains does not look like it grew in 2 years.
To get rid of the stain, are my options one of the two from below?
1. Isolate the heater.With jack's treatment #2 (or sulfamic acid) by dropping the pH, scrub and then drain the pool partially and refill with fresh water? (I have a JXi Jandy heater and I don't see a manual 3 way bypass/external bypass, so maybe need to have someone isolate it by using new pipes temporarily)
2. Just drain the whole pool and acid wash everything?
Thank you
So far, i have tried rubbing vitamin C tabs (did not take it off), rubbing trichlor tabs (does not take it off initially, but if I leave overnight on the bottom it does, I know now I am not supposed to, but I assuming it worked bc the trichlor tab is slightly acidic) and finally with Jack's ID stain, the treatment 2 (sulfamic acid) takes it off completely.
This suggests that it is likely copper/calcium stain, I do have some calcium scaling around tile by the water surface and some where the hot tub spills over to the pool. (pic 3)
The pool chemistry now: with taylor K2005C test kit
FC 5.0
pH 7.4
TA 80
CH 800(yes i know I recently did several cal hypo shock and will be using liquid chlorine from now on), our water from local area is 350
CYA 60
CSI 0.16
The stains does not look like it grew in 2 years.
To get rid of the stain, are my options one of the two from below?
1. Isolate the heater.With jack's treatment #2 (or sulfamic acid) by dropping the pH, scrub and then drain the pool partially and refill with fresh water? (I have a JXi Jandy heater and I don't see a manual 3 way bypass/external bypass, so maybe need to have someone isolate it by using new pipes temporarily)
2. Just drain the whole pool and acid wash everything?
Thank you
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