Humidity at 30% is too low , you need to look at the Vapour pressure deficit , and use the corresponding amounts , roughly 60% at 28C , test the runoff ph and EC , also I would add some cal mag to the feed at 0.5 ml per l . Flushing I do 2 weeks in soil , and hydro , drying can be done at most humidity levels at temperatures above 20C ,as the temperature goes up you NEED more humidity 👍