Active Air Pre-Filter, 4"x14" Pre-Filter:Active Air Pre-Filter, 8"x39" A duct filter box designed

A duct filter box designed for use with inline fans to circulate fresh air and block dust and odors

locate on a counter top or shlef instead of a cold & drafty floor

filtering the water when filling your tank can help maintain the cleanliness of your water in your tank giving more longevity before having to drain and refill

the Dosatron uses water pressure as the only power source

Active Air Pre-Filter, 4"x14" Pre-Filter:Active Air Pre-Filter, 8"x39" A duct filter box designedMake the most out of your Active Air filter with a corresponding Active Air pre filter. Find the matching size from our large collection! Why choose Active Air filters? All filters are maintenance free and feature long lasting activated virgin charcoal that keeps your air odor free. Inside each filter, the charcoal is carefully packed to ensure consistent and even air flow throughout the carbon bed for full use of the filter. Stock up on pre filters