@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...
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