both these pictures came from different plants, the first one where the inner parts of the leaves are yellow and only the tips are brown i believe to be a zinc deficiency. the other one looks more like a magnesium deficiency with the yellowing and browing going along the leaf edges and not just the ends. the reason im making this post is because im extremely skeptical that what i believe the deficincies to be are wrong, and the reason i think this is because i can find one picture of a zinc deficiency that looks like mine, but when people explain it it kinda sounds like what mine have, im more convinced the mag def is what im thinking it is but still wanted some other peoples opinions before i did anything.