Phalenopsis Orchid Leaves Shrink started water cullture

Orchids do everything slowly. They grow slowly they die slowly. Unless you froze it or put it out in the hot sun all day you wouldn't see a response within a day or two. You should use any fertilizer according to the label directions of course, and for orchids use less. A pinch in (how much?) water given to an orchid with no roots is probably not going to make a green leaf fall off right away. It was going to fall off anyway. Any kind of supplement, whether it be fertilizer or hormones is not a magical cure. Trouble with plants is that once you realize they are dying it is usually too late to save them and apply that to orchids doubly so. All you can do is learn from the experience and try to not let them get in that state to begin with.