They can be used as the primary filtration or added as a secondary filter to expand the fish-keeping capacity of your tank. Power filters usually hang on the outside of the tank. They pull water from the inside of the tank up into the filter, and pass it over one or two cartridges which trap the large particulates of excess food and fish feces. Cartridges also provide a surface area for biological activity which cleans the water of biological contaminates such as Ammonia. Water cascades from the filter back into the tank, agitating the surface and oxygenating the water on its way back to the aquarium.
Most power filters use replaceable mechanical and biological cartridge materials.
Magnum hangs directly on the back of the aquarium without tubing. Quick release cover latch provides fast access to filter media. Magnum connects directly to the Bio-Wheel Pro 30. A Complete filtering and maintenance system in one. Combines the superior biological filtration of the PRO wheels and the power and versatility of the H.O.T. Magnum.