Ph Lower after using BBB

[doggie]

When we used to use the pucks, it would be nothing for me to go thru 60 pounds of PH Increaser each season. Sometimes more!

Since we've gone BBB this year with fresh water (got a new liner right before closing last fall) I only added borax first thing when we opened. Ours has a settle point much like Janets and ours is 7.2. It's been right there all summer long without me having to add anything to raise the PH. Not once!

I'm really surprised your PH is still dropping.

[Tillysaint]

Many thanks for the responses.

I had my readings verified by the local Leslie's. I tested my house water & the Ph is 7.3. I really didn't add that much water and my test kit goes down to 6.8. I've own pools for over 25 years and they all have been very steady & good in regard to Ph. Last year I replaced my original liner in my current pool after 17 years due to fading & my wife was "bored" with it.

I added another box of Borax & the Ph is back up to 7.6. I'll keep you posted. I still have no clues!

Regards, Ron

[chem geek]

Ron,

Yes, keep us posted as to what happens with the pH. Also, just wanted to remind you that at a CYA level of 70 ppm that you are reporting, you want to have an absolute minimum of 5.2 ppm FC in the pool and probably want to target around 7-8 ppm FC (see Ben's Best Guess CYA chart). Though you may have other factors inhibiting algae in your pool, keeping to these levels of chlorine will ensure your pool does not get algae.

Richard