Key Features Highly porous for maximum bacteria growth Can be used in all types of pond filters Increases efficiency of filters Prevents algae growth High surface area to allow for more bacteria to colonise The Superfish Substrate filter media is specifically designed to be highly porous to ensure the maximum amount of beneficial bacteria is able to form on the surface. This, in turn, ensures the maximum filter efficiency for your pond. This filter media is ideal for the prevention of algae formation in your pond. Specifications Bag Size: 10L
