GPSFrontier -thanks for the reply. My system fills in about 2 minutes, so I made a digital cycle timer and will try a setting of 2 on / 18 off for three cycles per hour. I liked your point about feeding at night, so I added a light sensor and will have it cycle 2 on / 28 off or twice per hour at night. Is there a maximum dry time that the roots will dry out? Would a cycle every hour at night be too much dry time? trial and error - lots to learn! Thanks
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