Alkalinity with a vinyl liner

[csevel]

Is it okay to keep the alk in a vinyl liner at 130-140 if the PH has stayed consistant at 7.5?

[Rangeball]

100-200 has been recommended by Ben as just fine with vinyl if PH is stable.

[CarlD]

Actually, 0 to 180 is fine with vinyl... You CAN go to 190 or 200, but you start pushing your luck and can get scaling. If you have calcium in your pool, it can start getting cloudy at that level. Normally, in vinyl, calcium can go to 500. But if Cal is 500 and TA is 200, I wouldn't bet against your water going cloudy.

As for 130-140---GO SWIMMING and don't worry about it!

[denanbob]

My pool is fixin' to be one big cloud then. LOL!! My alk is 280 and my hardness is 450! UGH! I have some work to do...............

[CarlD]

I would agree. But the process is fairly simple:
Lower pH with acid to 7.0-7.2 to yank down alk, aerate to raise pH without raising alk. Repeat until alk is OK. This is the "short" version of Ben's stickied process. But it's the same thing.

When I need to do it, I have a sprayer that screws into the return instead of the eyeball. It's a fountain and it cost me all of $20--and it works very well. So does a crowd of boys splashing, or even leaving the pool uncovered with the return jet pointing near the surface.