DWCHC

@vasileiadisv56, these were clones, put to flower at first sign of roots able to touch the water.. so essentially the same thing only these are ready to flower, from seed it's about 5-7 weeks before it decides sex.. always female when using feminized seeds but still takes 6 ish weeks before they'll flower from seed

@TheUsualSuspect,not ice in the control bucket of water, this doesn't circulate around the roots, it's sole purpose is to chill the air lines only..

@nexuscrypto, another idea is to wrap the tubs with mylar facing out, it reflects over 70% radient heat.. to help with growing roots on clones, I use water with a natural ppm of 110+/- only until roots are approximately 4-6 inches long..in the absence of abundant nutes, they send out roots to look for food.. there's a point where they run out of stored nutes and you'll see stems and leaf petioles turn purple with yellowing leaves.. timing varies based on genetics, so it's a watching game.. usually they throw enough root before this happens... When they finally get a feeding, the growth picks up big time... It's a useful strategy to direct plant growth up or down...