Here's my suggestion... Flush one more good time. Make sure you use 3 gallons of Ph Balanced water for each gallon of pot size you have, and a flushing aid if those are available where you are. Fox Farm makes one called Sledge Hammer, Advanced Nutrients makes one called Final Phase, and there's also Royal Flush just to name a few. Basically if you have the plants in 3 gallon pots, they would need to be flushed with 9 gallons of water to ensure that they are nice and clean. Also - regarding your Ph, I would knock it down to about 6.3 if you're in soil. Instead of trying to add this, or add that, I would do the exact opposite. Your plants will live with plain ole PH Balanced water - rain, distilled, tap, filtered, or reverse osmosis. Just keep it simple. When you get to the last gallon of water you're going to flush with, use about 1 ML of Cal/Mag to replenish the soil. From there you can try process of elimination to see which of your additives or fertilizers is causing the problem. Add a SMALL amount of the fertilizer you've been using and see if the condition re-appears. If so, you've found your culprit. Also - make sure you are feeding, then plain water, feed, then plain water and repeat. It will help to keep salts from building up in the first place, which are the cause of most defficiencies and lockout problems. If nothing else, just give her plain water through the end of the grow. That's how it grows in the wild. You may not get the biggest buds, but they will be practically chemical free, and you won't kill your plant before harvest time by doing whatever you are right now.