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I have a 250 gallon Catalina Spa hot tub. I have a problem keeping my ph in check, seems to go over 8.2 over night. Trying to keep it at 7.5. with dry acid. My alkalinity is at 80 ppm, calcium hardness is 230ppm. Only use diclor for sanatizer and shock. Only turn aerators and pump on when in...

i have a 18,000 gal. vinyl pool. last fall my cyanuric acid count was about 45ppm. i opened my pool this spring and tested my water for cyanuirc acid was 0ppm. i was wondering because i live in iowa if you could lose acid because of winter conditions or is it normal to lose it. i do drain...

:x i put a homemade sprinkler into my 18,000 gal vinyl inground pool to cool the water down at night, it works but it strips all my chlorine residual down to nothing and lowers my ph and alkalinity. i heard aeration off gases and causes ph to rise. my ph was 7.2 and went to 6.8 alkalinity was...