Apologies in advance, but I am an oldy (70 years) and my knowledge of the etiquette for forums is very limited. I have a problem with my pool in that the pH keeps going high >8.0 despite adding numerous litres of acid. The acid brings it down to the acceptable range, but within a week or so, the pH is back up high (pool is not used much). Test strips indicate all other parameters are around normal except that the total hardness is high (>1000).
By way of background, my pool developed a crack in Jan 2020. I had the crack repaired and a new layer of plaster lining was put in to give a good cosmetic finish. At first I was able to keep all parameters in normal range, but the pH problem is slowly getting worse. A search of the net would indicate the hardness is the issue to be sorted. Some suggest draining half the pool and filling with fresh water - but it was only refilled last August, so I am reluctant to do this. Others have suggested adding Borax (17kg) to soften the water but I'm not sure this will help. Any comments would be greatly appreciated.
Thanks,
Tim
By way of background, my pool developed a crack in Jan 2020. I had the crack repaired and a new layer of plaster lining was put in to give a good cosmetic finish. At first I was able to keep all parameters in normal range, but the pH problem is slowly getting worse. A search of the net would indicate the hardness is the issue to be sorted. Some suggest draining half the pool and filling with fresh water - but it was only refilled last August, so I am reluctant to do this. Others have suggested adding Borax (17kg) to soften the water but I'm not sure this will help. Any comments would be greatly appreciated.
Thanks,
Tim