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I have 10 clones in two rock wool slabs about a month and a half into flowering. Im using BioBloom, BioBud, CaMg, blackstrap molasses. Within the last two weeks the lower leaves started turning yellow, curling their tips upward and dying off. This moved to the top of each clone, now the top leaves are almost white they're so yellow, turning their tips up too. the other day I flushed them with about 9 or 10 gallons then watered them with 1/4 strength nutrients, but they dont seem to be gettting better only the same as before. I know cuz they're in rockwool they need nuts every water so I do that, but I have the GenHydro Ph kit so sometimes its hard to tell what color it is so I think that I dont get the Ph at 5.5 most of the time, so they're not taking up the nutrients?