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Moved from Aerogarden (germination) to RDWC setup on 1/25/24. Started with FF pH down (citric acid). Large pH fluctuations over the course of a few hours. Res has 6 airstones powered by 2 separate pumps (AC Infinity dual output air pumps). One pump runs 6in. airstones (2), while the other pump runs 4 smaller airstones that came with the pumps (t-splitter on each output. Water pump (AC Infinity) has line split off of output to a DIY adjustable top-feed drip system, the other line goes to the other side of the res (opposite the pump) to keep water and nutes movin'. Pump is set to turn on every 2 hours for 20 minutes. Began with pump "flow rate" selector wide open.