Help Lab Mice Fight Mite Order Today - Free Shipping in the USInternational Shipping Fee May Apply 2.5 lb package $280.00 Add to cart 0.5 lb package Out of stock$65.00 View More Directions For Using MiteArrest Place two to three MITEARREST® cotton balls, per rodent directly into the animal’s cage.Change and/or replace MITEARREST® once a week, typically at the time of bedding material change.Continue this course of treatment for six weeks. Rodent to MiteArrest Calculator Enter the Number of Rodents: Amount of MITEARREST® needed is: boxes.