if the nutes hurt the plant more then stop them if u haven't...also have u checked the ph of the runoff on the plant or the ph of your water...this info would be helpful...if you can't check the ph then i agree u should flush the plants with water til the runoff is clear and see what happens...hope it helps...had a similar problem related to ph....i flushed randomly without checking the ph and things worsened...a ph meter is extremely helpful and in my opinion one of the most underated pieces of equipment one considers when growing