Wow...this is a job for the experts

[CarlD]

Yeah here's hoping it's really thick vinyl so there's enough of a layer that isn't damaged, otherwise it's all for naught. Acid softens vinyl--some of the people who used the "slug method" to try lowering T/A found this out--you can SEE the vinyl wrinkling where the acid is destroying it.

Swimming in that? You might end up skinny-dipping when it dissolves your suits...depending on your POV this could be a bad thing , or a good thing !

I hate to be pessimistic, but I think this liner, if it's not toast, will have a much shorter life.

But, as Richard said, you are doing everything right.

[bluecamel]

Thanks guys. I will try the dilution cya test. My neighbors' heads are swimming from all the stuff I am throwing at them. But they are sending in their funds to become members and are on their way to being converts. I think they will drain some in the summer, assuming their liner makes it. They have been pounding the pool store chlorine the last 2 months since they moved in.

I know you have heard it before but, as always, you are great.