Although I'm a new face to TFP, I have been in the BBB business of pool ownership since I had our pool built in June of 2006. I see a lot of familar faces/signatures here that helped me through the "UH-OH I have a new pool and no clue what to do" when the water went in and the pool builder said to throw away the test kit that came with the pool and just keep pucks in the skimmers. I would like to thank all you guys for the help.
Now for the alkalinity question I have. I was given advice last year to bring my alkalinity up to range. I was having such a trouble free time last year that I never tried to address a slightly low alkalinity. I decided this year to get everything in place at the beginning of the season and attempted to raise my alkalinity to 80. I have seen it explained how alkalinity and ph work together but I don't quite understand the chemistry behind it. My alk at 80 gives me a constant/persistent ph rise that requires acid to lower at least once a week. If I let alkalinity stay in the 60-70 range my ph will be consistent at 7.5. Why does this pool like to be in the 60-70 alkalinity range and will it hurt anything to run it that low?
20x40 vinyl liner, sand filter, No SWG, No heater, and approximately 25000 gallons
ch= approximately 70
temp = 80