Having issues with my veg plants. Leaves are yellowing shrivelling and overall not looking happy. They are in m3 soil and promix half n half. Been watering at 6.0 ph temps are 71-75 humidity 40-47 using general hydro trio nUte line. also grown under cmh 315w And is away from the plants about 3ft Also new growth is bright lime green and stems are purple. Any ideas?