Liner Wrinkles

Wrinkled or puckered liners can be caused by low pH. How long it has to be low to damage the liner I don't know. Liner wrinkles can also be caused by high ground water behind the liner.
 
A new client called me, and that was the reasoning given by the gentleman that installed the liner.
I have not yet inspected it. Either way may be the case.
Although, he did tell me he has been using 3" pucks so I can't wait to see the high cya. And that also could be why it is wrinkling. I can't wait to share you guys with him.
Thanks for the input.
 
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