ok, from the ic forum, what is your ph? For hydro ph should be 5-6, because this is when all the nutes are available to the plant. You probably have a phosphorus deficiency if this occurs during flowering or zinc deficiency during vegetative growth. Since this looks like veg cycle is't zinc.
Gen Reviewed by Gen on . Identifiy the problem ~800 PPM CalMag + FloraNova Grow PH @ 5.6-5.8 at all times -- Skunk #1 -- These are clones under @ a little over two weeks of vegging - I did find algae in the res, so I changed nute solutions last night -- They are under 18/6 cycle -- Plants are getting progressively worse as time goes by. This seems to mainly effect the fan leaves... Rating: 5