PH Levels after Newly Plastered Pool

[CarlD]

The lower TA should help. As the concrete cures the rising pH should end. Do you have anything like a waterfall or fountain or other water effects? They all create aeration which tends to raise pH (but doesn't raise TA--that's why we use it in our TA-lowering strategy).

[markphin]

No fountains. A spillover from the hot tub though. Yeah, I'm sure the PH will stabelize eventually. I just didn't think it would take this long. I'm hoping it stabelizes by the time I winterize in another month or so.

[CarlD]

The spillover could well be part of the reason for a rising pH, because it will aerate the water.

[markphin]

I kind of doubt it, as prior to the replastering, I have had little rise in PH over the couse of the previous 13 years. If I put a gallon of acid in a summer it was a lot. I think its primarily due to the curing of the new plaster. Perhpas the aeration is adding to it a bit though. I guess I just have to be patient and wait it out. Hopefully not to much longer though.

Thanks

[Shifty]

@markphin: I am about 5 weeks post a re-plaster with krystalkrete. For the first 3-4 weeks, I was adding a similar amount of muriatic acid as you were. I was brushing the surface twice a day; however, a lot of the plaster dust was staying in the deep end near the main drain. Once I hit the 30 day mark and used my pool vac, I was able to vacuum any excess plaster dust. Since removing the plaster dust, the pH has stabilized. While the plaster continues to cure over the next 6 months, I still expect the pH to slightly fluctuate.

Make sure to test your water regularly.

Have you seen your pH stabilize? I realize this thread is almost a year old.