I am almost into week four of my flowering stage in 5 gal soil buckets under a 1000w hps. I have attached two pictures that show two seperate problems. The silvery spot on the leaf is, I am pretty sure, some kind of bug. correct me if I am wrong. However, I am baffled by the other picture, these brown spots are on all of my plants but not on all of the leaves...eventually causes leaf to dry and curl under. Any suggestions or advice? . Also, the pics are just a close up on one leaf.