Hello, long time smoker noobie grower here. Having some trouble getting good grows. I am growing is a 4x4x8 tent. 1500 watt Bestva LED light. Cheap circulation fan Humidity 35 to 40 Temp 75 to 78. Soil promix HP Water is RO water I purchase they said it’s around 6.0 to 6.2 ph Seeded on Oct 4 Light approx 2 and half feet above plants Symptoms lower leafs are turning yellow when I first planted the few leafs then grew turned yellow and have fallen off. The new top growth looks good but the lower is slightly turning yellow. Always some leafs look to be drooping down. I believe I might have nitrogen deficiency? Any suggestions?