Some of the lower bigger leaves are turning yellow from the outside of the leaf in, I think. I am going to post more pics and hope somebody helps. I am torn between whether it is a nitrogen deficiency (as my lower leaves are loosing color and turning yellow) or nutrient burn. I have been going very light on the nutrients, but I see the tips of some of the leaves yellow and brown. The claw has taken control of two or possibly 3 of my plants. Any help is greatly appreciated. The pics tend to make the plants look greener than they are.