Cooper’s Own Hot Flakes De-Icer from PolyJohn Enterprises is a safe, convenient and easy-to-use option that allows operators to pump restrooms even when temperatures drop to -25 degrees F. The easy-to-use pellets are made up of a chemical component blend of different chlorides. Just scoop the directed amount of pellets from the 30-pound bucket and drop directly into a freshly serviced unit. 800/292-1305; www.polyjohn.com.