Quote Originally Posted by flyby357
I asked some where else but I can't find where but I know where I am now. The question is I have a 400w HPS how far above the plants should I keep it so it doesn't burn them I am already getting some fert burning going on.
ummm. yes. keep the light high enuff so it doesnt burn your plants.

good thinking.

for your fert burn, stop ferting and flush the plant(s).