I was using an auto siphon, so the racking cane was built into it. I marked the side of my auto siphon with a sharpie to indicate about how low I can go and still stay above the trub (since I use a pail and can't see the trub in a full 5 gallons). The mark was based on past experience as my earlier beers all had about the same amount of trub in 5 gallons. The whirlfloc created so much trub tho that my marking was off. That was my problem, not that I wasn't using a racking cane.