Well I got so worried that I ended up flushing my plants with luke warm water and replacing the nutrient solution to a 3-2-1. I also cut back a lot on the ventilation....I have a passive system which blows air out and brings air in from the attic. I think I was cooling them too much despite the 1000W being on in a small room. Room temperature increased and i noticed immediate results for the better......I'm also used a heating pad to help prevent the nutrient water from getting so cold....I'll keep you posted.