there is some kind of burn spots on the leaves i have some pics of it but there takein from my phone i give them about 6.5ph 600ppm the lights are about 16 inchs away help me what is it
im useing IONIC Grow Solution its for hydro but the guy told me u can use it for earth and its just as good the plants are about a mounth and a half old thay have 2 - 1000hps on a rail and two fans blowing between the lights and the plants