I am one week into flowering my "Dark Heart Nursery" "Romulan Grapefruit" strain Heartlets. I vegged them 18/6 under a 400w M.H. for 2 weeks,now i am one week into 12/12 under a 400W H.P.S. Things have been growing great until this morning when i rotated them, i noticed some discoloration on the...