Get on the road toward a healthier and happier underwater environment with the Clean Aquarium Filter from Zoo Med! This high quality internal filter is designed to provide unmatched filtration in betta tanks up to 10 gallons in size. Its versatile design allows it to be mounted either vertically or horizontally while only using 3.5 watts of power at any time. Plus， it’s easy to clean， as the main filter can stay in the water when it’s time to tidy up.