yeah man i had same prob epsom salt done the trick but watch ur ph run off
doobee bros Reviewed by doobee bros on . Is this a magnesium deficiency ? LED Grow update no.18, January 12th, 2011 Taken from "indoor growing", "testing the pro-grow 260 LED light" Hey all, So over the past 2 days I have noticed one of the plants showing a deficiency. To me it looks like a magnesium issue. I gave that plant an extra feeding of bat guano and some seaweed and tomato fertiliser. I mixed a heaped tea spoon of bat guano in warm/hot water and mixed it well. However, this extra feeding did not seem to fix the problem. I did some reading on the Rating: 5