First time poster.

Have you checked the PH? What do the roots look like? Sounds like an ozone machine is pointed right at the poor thing. Too much light, what is your schedule? If your pot is too small, under watering is possible? What is your ventilation like? Lack of water for sure. Too many questions.
Any case you might need to flush with PH correct water without nutes for a few hours or a day. This would wash the salt buildup away from the root system and wherever it builds up.
I could be completely wrong but I thought I would stab at it fer ya. I do feel fer ya. Take it easy.