Ro water ph drift

Thank you for the feedback.

it appears my AC Infinity bases are acting like a DWC system and feeding primarily from the roots that have grown thru the fabric into the bases.

Last night I check the PH in my bases and it was 6.9. I siphoned all the water from the bases and added fresh RO/CalMag/Jacks321 to the bases ph’d to 5.6. 8 hours later, checking the water in the bases, it has drifted up again to 6.4??? At a loss on what to do. I suppose if I started top feeding, and suctioning off the water in the bases, the roots in the bases will end up rotting.

Should I just continue adding a days worth of water to the bases with a lower PH and let it rise and then lower it again next evening?

I ran these same bases last year without issue, just can’t figure out the best way to correct.

Plants are still growing well, the leaves are just lime green and are curled upward along the length.

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