Baron, what kettle/equipment do you use? My Grainfather always feels like it would block at the slightest excuseI use approx a 1/3rd of a tablet nowadays and have always run my pump without a filter, it has never blocked mind you I do use a hop spider then after removing it I stir the wort fast to whirlpool the trub into the middle, let it stand for 20 mins ish and I get hardly any trub into the FV