I used them in a brew yesterday. Worked out great, was a wheat and had zero clumping. My mash went great. I should have let it sit longer, it help the mash temp really well. I really think it was the rice hulls, they let the water really get into the grains. Yooper gives a very scientific approach to how much to use, two hand fulls. It worked great fir me.
Bill from Pa
On Deck: Irish Stout,
Primary: Pumpkin Ale
Completed: Red, Wit and Blue, Irish Stout, Red Ale, German Style Amber Lager, All Grain Brews: Irish Red Ale, American Stout, Honey Weizen