Filter Block Pure Carbon Brand Replacement 20-Pack - Distributors Filter inch - Distributors Filter 10 Housing Activated H2O Under for H2O H2O Inline Sink Single for H2O-RUS-100-I Universal Denali * Under Gravel Filter Circulates

Filter Block Pure Carbon Brand Replacement 20 Pack Distributors Filter inch Distributors Filter 10 Housing Activated H2O Under for H2O H2O Inline Sink Single for H2O RUS 100 I Universal Denali * Under Gravel Filter Circulates * Under Gravel Filter Circulates Water Flow Through the Gravel Bed * Requires the use of an Air Pump not included * Maximize Water Quality by Using a Power Filter * Provides Biological Filtration * Can be used in Freshwater Aquariums and Saltwater Aquariums Lees Premium Undergravel Filter has a multi level plate design made of special quality plastic which resists splitting or cracking 5 x 71 x 102 cm