Safe pH levels for vinyl pools

[waterbear]

Perhaps I am but that's mainly due to the fact that we have no indication that anything is driving the PH down. It might very well have been at the level for the last 4 years. We don't know because it wasn't being tested. Couple that with the notion that high CL is more damaging then Low PH I just think it should be mentioned in passing in case it's true.

Then based on what you say we should never shock a liner pool because high sanitizer will damage the liner and cause it to wrinkle by taking on water... empirical evidence notwithstanding.
(And this discussion is more suited to the china shop than in this hijack of the OP's thread.)

[aylad]

DurhamHouses, our advice to the OP is not changing....whether you agree with it or not is up to you. At this point, if you want to continue the debate, please do so in the China Shop so that the original poster can continue his thread here if he chooses.

Janet