Filled with activated carbon, the duel-sided mesh filter cartridge
helps absorb odors, pigments and chlorine. The National Geographic
Filter Cartridge for Betta Tanks fits the Half Moon Aqua Oasis and
Alcove Aqua Oasis.
Features: Keeps aquarium clean
Includes: 2 Cartridges
Dimensions: 2.1 in L x 1.9 in W x 3.7 in H
Warning: This is not a toy. Keep out of reach of
Directions: Rinse the filter cartridge under cool tap water to remove dust.