BigDave is right: NJ is the heart of Pharma in the US so there are probably more chemists per 100,000 than anywhere else. I'm on the other side of the pharma biz--statistical programming so I don't know jack about chemistry--my last exposure was HS chem in 1972!

HJ: Remember: You can always add MORE. And you'll need Muriatic Acid to bring the pH back down. As with all things other than chlorine: Add SLOWLY and be patient.

"I think I'll try it next summer - almost time to drain, dry, fold, and store.

3200 Gallon Big Blue Bag of water in the backyard."

Love that! My first pool was an Intex 15'x3' donut and we used it for 3 years! Nothing like sitting in a floating lounge chair with a glass of iced tea, listening to an afternoon ball game. 15' or 40', doesn't matter!

Carl