I recently started using whirlfloc tabs in my boil and now I'm losing about a gallon of wort to trub. The trub is supper light and an does not settle. I can see the clear wort but cannot rack it out without pulling tons of trub into my primary. Today I started with 7 gal. at the start of the boil and by the end of 60min I was down to 5.5. After cooling and racking I had 4.5 gal. in the primary. Am I doing something wrong?