Ac auto watering pots

Looking for so input in the Ac infinity wick auto watering pots, I filled bases with roughly half 3/4 full and one plant drank all the water however, the other 7 plants still had a considerable amount so I tested the PH and it rose from 6.2 to 7.4ph in less that 24 hours I know it raises a little after sitting there but that PH was lowered with 1/4 nutrients and rest with PH down. Long story short should I be worried with checking the ph or is it fine to let plant finish it up?