I have 2 plants about 2 months old and 2 plants couple week younger in a homemade hydroponics setup using same res with air stones in each bucket. Rh is 55% and temp 20-23°c. Grow light is a 315 cmh about 25inches above plants.
I'm using tap water with floranova grow at 2tsp/gal at 5.5-6.5ph...