I stopped watching the Anime and Downloading the Manga when I realized that I couldn't figure out what the fuck was filler and what wasn't. It's like this decade's DBZ.
As far as I know, the Anime has two full filler arcs. Mother fucking Arcs. Not even DBZ is that bad, as the little sagas lasted like seven episodes (Which is saying something for DBZ). Then it has tiny pockets of filler that are fucking everywhere.
I mean, hell, why stop right after Grimmjow is defeated? The fight technically isn't over yet. That's like "Oh, well the Spirit Bomb exploded, Freeza looks dead, TIEM FOR A FILLER ARC GUIES.