Filtration is the key to a successful aquarium. Aquarium filters provide a home for beneficial bacteria to grow. As water moves through the filter, the good bacteria breaks down the fish waste to keep your aquarium water crystal clear.
Choose your filter based on the size of your aquarium and the number of fish you keep. There’s a variety of filters out there, from basic sponge filters for fry tanks, to canister filters for larger aquariums. Internal or hang-on filters are also good options for small to medium sized fish tanks.