Marineland Magnum Micron Cartridge is excellent for polishing your aquarium water. This cartridge will pull out the finest of particles, resulting in a crystal clear aquarium.
Can be used with diatomaceous earth, but make sure that your filters instructions specifically state that it is designed to be used as a diatom filter.For use with Magnum 200, 220, 330, 350, and HOT Magnum 250
