Wheat and Rye malts do not have husks along with flaked rice, corn, wheat, barley and rye. Using these malts and flaked grains can lead to a stuck mash. The addition of rice hulls helps to create channels for your wort to filter through your mash. Dosage is typically 10% by weight of the malts without husks in your mash. If you have 5 pounds of malted wheat, rye, flaked wheat, flaked rye, flaked barley or flaked corn in your grain bill, you should add 1/2 pound of rice hulls to your mash and mix in thoroughly.