Better get a drain up in the attic. Your going to be busy.I am flattered, but for future reference, I'm not in the same league as those guys so you might wanna expand your tags to include someone who knows alot more than me, which is basically everyone. HOWEVER - this problem is quite familiar to me. My Pineapples looked almost the same. Your nutes are locked out. That's my guess. You have salts built up in your roots and the plant get it's nutrition. Again, that is my guess. If it were me I would flush around five to ten gallons of clean water through that plant, wait an hour, then feed them wherever you are in your nute cycle and be sure to include veg nutes (a little) and CalMag (1 tsp/gallon is what I use with almost every watering now).
For what it's worth, that's my take. You can do this.
Bill