Measured pH 7.4 --> 8.0 Total Alkalinity 90 Cyanuric Acid 25 Calcium Hardness 200 TDS 550
I live in a semi-desert region of Southern California and I won't be 'closing' the pool, but I'm concerned about
the LSI becoming too negative due to the decrease in water temperature. I won't be heating the pool, but I run
the pump and filter every day for about 7 hours.
I keep the pH between 7.4 and 8.0 (it likes to increase due to the spillover spa, I think). In the summer the
water temperature stayed about 80 degrees and I was successful in keeping the LSI between +/- 0.3. Now the
water temperature is 45 (and I suspect it will get lower). The LSI now goes between -0.1 and -0.7. I have
read that it's OK to let it get a little corrosive, but this seems a bit much.
Should I be concerned, and if so, what should I do about it? I could keep the pH above 7.6. I could add some
bicarbonate of soda. I don't want to add Calcium because we have very hard water and I think it will eventually
rise by itself -- right now the water is not evaporating very fast.
Thanks in advance for any advice
and have a Happy New Year.