Hi, I have a problem that i cannot seem to solve. It pops up with all strains about the 2-3 weeks of flowering. It starts close to the top, about 10 inches from top close to the light then starts browing from the edges inwards. It then starts spreading to other leaves even on the back side far from the light. I am using floranova bloom,, floralicious plus, koolbloon liguid and cal mag. My ppm is about 500 and pk 60-6.2. I will try to post pics tomorrow. Please help!!!