It looks to be too hot of a Phosphorus level, to my untrained eye. I grow in
Promix and feed every 7-10 days. It sounds like you are using a fortified medium and adding to it, which can cause several issues, including Ph problems and the associated nutrient lockout the happens because of it. Adding
Cal-Mag indiscriminately, without having any idea of the water sources general makeup and dissolved minerals can also cause issues. I would flush out the medium and everything possible, but I would use distilled or Reverse Osmosis water until you know the local tap water's qualities. I'd flush a few times, then let it rest for a day or two and observe it for any new developments. If everything is OK, I would start on a 25% regimen of your previous feeding. It's important to know the soil or medium you are working with. Fortified soils are great as long as you don't add to them. Plants don't eat like teenagers, with more food = bigger/stronger kids. Its more like prednisone...a little extra can be useful at times, but too much for too long and problems arise. Again, this is just my opinion of what I would do. Reading posts is a great way to get info as well as everyone has had issues at some point, and a lot of info, sometimes too much or conflicting, is given. This is simply because there are so many different ways to do it, and some might work where others fail and vice versa. Good luck and keep up the great work!