I use a hop spider during the boil - and like others, I can't say if affects clarity. The biggest change I saw was using a Whirfloc tablet 5 minutes before flame-out! That along with an active fermentation in an undisturbed environment for at least two weeks seem to give me very clear results. I do drop the trub from my fermenter after about a week (sometimes), but I'm not convinced it affects clarity other than making it easier to avoid the trub when transfering the beer after fermentation!

