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Thanks Tim5055 and JasonLion for your quick answers. The pH meter is a Oakton pH110. Measures from -2 to 16 pH and I just calibrated at 4, 7 and 10 with new reagents. Very astute of you to conclude the previous owner's dump of shock causing the pH to nosedive and the CYA telling that tale...

We bought another house surrounded by pine trees out in the country. Pool is old, maybe 30+ years. Apx. 23,000 gallons. Gunite. The pH is 3.83!!! The chlorine is well over 30ppm!!! TA is 30 CH is 370 CYA is 150 I think the previous owner must have shocked it. I've checked it about three...

Thank you so much Mr. JasonLion for your quick reply! I'm putting my best man on that as we speak! ;) This is such a great forum. Thanks for making it that way. My Best! -dave-

Hi, Folks…Good to see you all again. On my 3rd year of the BBB method and I’m as pleased as punch, but have a question for you astute members. I believe I have had the same CH reading since I started, but can’t remember. 15,500 gallon in-ground gunite pool circa 1975. pH = 7.35 CYA = 35 FC...