Here are my latest readings:
FC 1.5 (water temp under 40 so not worried about this)
Plugging the above numbers into the pool calculator gives me a CSI of -.27. If I lower my pH down to 7.8, the CSI goes to -.46. Down to 7.5 and its -.74.
Is there any reason my pH can't stay at 8.0? During the summer when the water temp is up I shoot for 7.5-7.8 and the CSI is higher so the lower pH is needed then. But with the colder temps the higher pH seems better. Is this correct?