Browning of leaves

first things first if you want to save your plant, flush the plant really good, check run off ph. get run off to 6 ph, leave the plant alone for a few days, continue feeding plant cal mag only for the first 2 feeds, if you have any kelp add that as well as that will help the plant re bound. pick off dead looking vegetation, start your next real feed after the first week, start using half the nutrients and work your way up, add cal mag and kelp you your line up. give her a few weeks and she should re bound, fix this before going to flower.