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I've read and heard others say just enough for the roots to touch. I'm using 5 gallon buckets with about 3 gallons of water. I change the water weekly and when I do I notice my plants damn near drink it all leaving hardly in the buckets. I'm on week two of flowering and used this amount the whole time. I'm just worried about getting root rot. As of now my roots are massive and white and doing fine. So should I lower the level of water and change more often or leave it alone?
from Hydroponics / Aeroponics https://www.rollitup.org/t/how-much-water-in-a-dwc.509288/