I would try different things mentioned. You are not attracting Sacs ,you are attracting Minnows and grass shrimps to the food. That in turn brings Sacs. I myself use horse and mule feed with molassas in it. Terrerific bait. The sweetness of the molassas ferments and draw minnows and grass shrimp by the thousands. Willow branches are good also. IF THEY HAVE CANE SYRUP ON IT BEFORE YOU SINK IT. Don't tell anybody I told you this. Good luck.