Hi All,
I have three plants that are 3 weeks old and only about 3" tall, green, two sets of leaves, spindley stems, appear healthy? temp 70, hum 56, tds, 300, ph 5.6 have 400 hps on 18-6 with intermal fan blowing 24 hrs a day, feeding 15min every 3 hrs hydroponic system runs back into...