I've included some photos, let me know if you need them in more detail. The plant is relatively tall, 14.5" from perlite to the top node. There's some fresh growth at the bottom, but a couple of the small leaves are showing similar symptoms to the ones you see here. The worst symptoms are showing in the bottom -> middle of the plant. Problem begins at the tips of the leaves and works it's way in it seems, and it hits the veins of each leaf first and works it's way to the outside. I also think that I've left them a little long without a feed.. I've been a little overexcited about my new flowering area... whoops.. :BangHead: After looking at the problem solver I ended up with: Let me know what you guys think.