I've tried more Cal/Mag, and I started using Epson salts, and I flushed the shit out of them, and nothing helps. They are 6 1/2 wks into flower and I'm sure it's effecting my potency. This problem has gone on for weeks now and I've tried every suggestion but it hasn't stopped. (I'm sorry that the 1st pic uploaded 4 times? no comprende) I have 3 Pure Power Plants (mostly sativa) in 3, 5 gallon buckets I'm stuck using GH Floro Trio for nutes (@ 1/2 strength) (YES, I know, I should be using soil frendly nutes. But I started in hydro so this is what I am stuck using for now.) 600W HPS 4' X 4' by 6 and 1/2' grow tent. I add 1 tsp. Cal/Mag, 1 and 1/2 tsps. Epson salts 1/2 tsp. Micro, 1 tsp. Grow, 2 tsps. Bloom and a 1/2 tsp. - Hydroguard *If you'll notice that the lower leaves aren't effected?