80-85 degrees F is too hot. Do you have a fan in the growspace? If not, you need to put a small to medium sized oscillating fan there for two reasons - one is to carry hot air away and two is to knock the plants around a little. This will cause the trunks (stems) to strengthen so they won't fall over. Try to bring in fresh cooler air if you can and exhaust the warm air. Some growers use ducting with fans attached to holes in walls and ceilings to get the hot air out and the cool air in. I think the brown patches you see are heat damage.
polishpollack Reviewed by polishpollack on . My leaves are rolling into balls!!! Help please Automatic Lemon Skunk indoor hydroponic Rockwool and Hydrotin Hydro - bubbleponics ( two airstones and lower feed drip twice a day) Half tap water half RO water - PH 6.0 4 weeks from seed Technaflora Recipe for success nutrients the box says my ppm is around 1000 after nutes added Rating: 5