I probably need more info, like what was the wrong does of GHE flora series? I use the same line and would like to know how much Micro you added in there when these problems started to occur. I'm going to take a stab at this though, but I would wait for other answers to either confirm or deny my opinion. With more info, I may be able to diagnose a bit better, but here we go. I think we're looking at a soil pH imbalance and/or Nitrogen Toxicity that she's trying to work through. These leaves are quite dark, almost forest green. This along with the slightly turned down tips and slight nute burn, may be an indication of this Nitrogen Toxicity. It appears she's taking more then her fair share of N while neglecting to pick up P/K/Cal/Mag. The rust spots and dry/papery look of the foliage appears to be a Calcium deficiency, but I assume there's a P deficiency right behind it (Cal and P work closely together. You have a problem with one, there's a good chance there's a problem with the other). This alllll, I feel, is due to the pH imbalance and I'm curious what your run off numbers are looking like. What's the pH and PPM coming out the end of her? Knowing this will help you make a plan moving forward. I can't give any hard answers, but the pH maladjustment needs to be addressed first and foremost or the nutrients being added won't have the desired effects (may be locked or semi-locked out). If and when you have those numbers, through me a message in PM or to someone else you're talking too and we can sort some things out and help you make up a plan to pull back these symptoms and make that soil right👌
Hope that helped somewhat. Again, hit me up in PM if you're like. And GG is the absolute best man!