i have some kind of burn. idk if it's nute or heat its not hot in the grow space but i have a 400w mh about 18" from the plants. i have been using 1/2 strength lucas formula (4ml micro 8ml bloom per gallon here are the pics. i caught it pretty early, they were looking great last night. should i flush the res or move the lights? thanks and sorry if this is considered a double post because i posted in the sticky
What is the PH at? I'd flush just to be safe. They're either gonna get better or worse. If they get better, problem solved... If not, then at least you've started the process of elimination to figure out the problem. I usually have them at 1/4 strength nutes at that size, if any at all... And the 400 watt might be in excess, they don't need that much light right now. if you wanted you could run them under 1-2 cfl's to conserve energy and your mh bulb.