I don't worry too much about the trub getting in the fermenter. I whirlpool for a while, and let it settle, but with no pickup tube, and as thin as the break is, some of the trub makes it in. I make some effort to keep trub out of the fermenter, because the less trub in the fermenter, the less trub I have to try to keep out of the bottling bucket. However, I don't really worry about it.