Guys, thanks for the advice on my fucked up plant above. I´ll try to hold on to it for a while, to see if I can make it bounce back, if not I will chop them up and try to get clones and make an (involuntary) SOG.
I don´t think its a salt buildup, given my feeding regime, but @Worcestershire_Farms is probably right about PH of either water/medium/runoff. So far I haven´t ever PH checked anything.
Can someone reccomend a cheap and reliable-ish PH meter? I don´t mind having to calibrate now and then. Thanks!