My plants are getting burned. At first i had the reflector about 18inch from the canopy runin 1000w cuz i thought the bulb was damaged and not running up to par. Then the leaves started curlying up. The end tips of the leaves turned black/brown even the smallest shouts. Then the sides of the leaves. I raised the lights to about 20 inches and lowered the ballast to 600w but nothing changed them i checked the ppm and it was around 1700 so i lowered it to 1400. Still nothingdoes anyone knpw what the problem is ?so i cam fox it
