Hi, Dave,

Good work getting that in there. 6.6pH is a corrosive condition....not good for anything in or around your pool. (which contains 13,000 gallons)

If you don't have a test kit, you should make it a priorty to get one. Testing for Cl, pH, Alk, and CYA will all be important. I saw a 5-way HTH brand at Lowe's that'll do what you want. Ben's (sold here) is the very best and will pay you back year after year.

I'm not positive, but I think "pH plus" is the same as borax. Somewhere around 16 oz. should start to move the pH. If you have a test kit, you should see a difference in a few hours. Testing around dusk would work.

On a similar subject, you may need to adjust your alkalinity a little but let's wait for the next Ph reading first.

Now, since you're out there at dusk testing with your new kit anyway , put in 3 gallons (not jugs) of 6% Clorox. Don't skimp. this is gonna' clear up your water....not the pH adjustment. That'll bring your Cl up to 15ppm and start to get rid of any remaing organics you may have in the pool. Check again, just before you go to bed and bring it back up to 15ppm. Use the bleachcalc to tell you how much to add.

Lastly, no hurry, but your CYA is a little low. I would add 1lb (into the skimmer, don't backwash) and that will, in a few days, bring your CYA up around 30. You may want to go a little higher later and you'll have some left over if you get the 3lb bottle at Lowe's.

Dave, the key to getting really perfect water is that test kit. It's really easy to offer advice if we know your current chemistry. Plus, there's just no telling how great your reward will be from your wife when she sees that beautiful water!!