Is this PH Lockout?

Flush it and foiler feed in low dose so your plant gets some nutes. Flush again in a week then add very little nutes to soil and continue water, Nute, water. Should be fine just make sure you foiler feed so your plant get what it needs to live.

Shit I'd kill for Rep!! Lol I get nothing but likes... allday

yep not enough cal/mag in your water - add some and she will be as good as new !

Looks lot like ph lockout to me. I would do a heavy flush 6.0 to 6.5 then when soil drys do a feeding with cal-mag. have you checked you run-off?

I had this issue with my Durban Poison... I had tried cal/mag, flushing, minimum nutes for a month and everything else! In the end all it took was half of a Zinc supplement for humans, Zinc Chelate! You won't recover from the damage but the claw will no longer show in new growth and it will have more supple leaves instead of the leathery and brittle feel I bet you have as well. Good luck, I hate the hard to diagnose problems too...