Ph going up crazy in spa

Ok. Full set of fresh test results in pool.
Fc. 3.5
Cc. 0
Ph. 7.6
Ta. 70
Cya. 70
Ch 375
Salt. 3900
Looks pretty good to me. I'm going to bring fc up a little and ph down a bit. Ch has risen on its own. It used to hang at about 250. Ta and cya have dropped as well.
Spa again reading ph off the charts overnight. Was at 7.6 last night. Fc same at 3.5 no change there.
Will adjust filtering to include more spa. See how that goes...
 
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