Also you're going to want to emulate a different way of watering and transplant. First. Water the whole thing. Is that an upside down biodegradable seedling pot?
Bottom feeding is a recipe for disaster, as there's no way to flush old salts out, top feeding is the way to go. Is this pyramid growing a new fangle thing.
You're going to have to put a soil mound around the upside down pot and water thoroughly. That upside down pot is made to breakdown in soil after some time. I wouldn't doubt those roots are bone dry and very thirsty. Water and feed her something for stressed plants