* SCIENTIFIC SONFIGURATION & RATIONAL COMBINATION --- Aquarium filter media set combines with a variety of filter materials, scientific and effective mixing ratio, makes fish tank filter works better
* IMPROVE WATER QUALITY EASILY --- Biological filter can filter and purify water in all directions, improve the quality of
aquarium water, eliminate impurities and stabilize PH, keep the tank in a stable and clear state

* BACTERIA HOUSE --- Bio balls ceramic rings provide nice home for beneficial bacteria, encourages growth of biological colonies and holds a lot of benificial bacteria, which will create the most suitable living environment for your fish
* GREAT FOR ANY TANK --- Bio balls ceramic rings media works for any freshwater or saltwater fish tank or mini-reef aquarium, Good to use in different type of filters