hey there MaskedCucumber, honestly it's pretty bad, but you might not notice it if you dial it in. So you're complete right in your assessment , and you also see newer growth with discoloration , that also means an issue with immobile nutrients plus the downward pointing tips means you have root problems. So the most important thing is dont panic, now is absolutely not the time to flush and cause water stress to your plant. What I suggest is to take a look at your nutrients, cut out the xtraroots and cannazym and replace it with humic acid . The xtraroots has concentrated N in it plus a lot of microbes that are finally very well established, the the zym increases that. humic acid is actually much the same but it has different properties, for example it can also fix your root problems from the xtraroots. usually when you're in flower you do want to stop giving that stuff, but anyway in your case the problem was some "hidden N" inside it. so another pretty good thing with the humic acid is that it will air out your medium next watering just use that once, then replace the other additives with that humic acid for the next times and keep doing what you're doing, you'll see all the problems stop spreading and the plant should recover immediately. By the way fluvic acid also works, just be a bit careful with your pH. Hope this helps ! 🚀