Sponge

Mechanical filtration: Provides excellent filtering effect while oxygenating the water Biological Filtration: Foam material supports the colonization of bacteria Can be used with either an air pump or any external filter Silent operation by reducing air...

Mechanical filtration: Provides excellent filtering effect while oxygenating the water Biological Filtration: Foam material supports the colonization of bacteria Can be used with either an air pump or any external filter Silent operation by reducing air...

Mechanical filtration: Provides excellent filtering effect while oxygenating the water Biological Filtration: Foam material supports the colonization of bacteria Can be used with either an air pump or any external filter Silent operation by reducing air...

Mechanical filtration: Provides excellent filtering effect while oxygenating the water Biological Filtration: Foam material supports the colonization of bacteria Can be used with either an air pump or any external filter Silent operation by reducing air...

Replacement pad for item number 13392 (Foam Filter - Dual Action 25 gallons) Triangle.

The Dual Action Foam Filters are Biological Filters composed of open-celled foam which provides enormous amounts of usable surface area for beneficial bacteria to colonize.This Bacteria breaks down harmful waste substances (ammonia & nitrite), making...

Trouble- free biological filter design, made of special quality plastic which resists splitting and cracking, also has optional flow-thru set-up for use with a power head. Size 6in x 12in.