sir_isOanswered grow question 3 years ago Looks like you got SERIOUS toxicity issues there.
Lay off whatever nutes (unless they are VERY mild and quite general, like not just NPK shit, some microelements, etc).
And then, I'd recommend a little calcium, epsom salts (mainly for the sulphur, but so that it kinda goes with the calcium) and potentially a tiny bit of boron.
But this is very speculative, just trying to mention sort of mostly safe, potentially buffering things. You'd have a better idea of the pH and shit.