is bleach episode 158 filler?

When Pesche Guatiche sneezes out a large amount of liquid from his protuberance onto the floor of the hallway they are standing in, a disgusted Uryū Ishida rears back and berates Pesche for snorting out his mucus like this, only for Pesche to claim that it is actually the liquid he produces that makes anything it touches incredibly slippery. With a surprised Uryū identifying this as Infinite Slick, a confused Pesche wonders what he is referring to.