Marineland brand is the world’s leading brand of innovative equipment and environments for consumers wishing to create the ultimate aquatic showcase. Committed to fishkeeping success for over 40 years, the brand is the professional’s choice for commercial display systems and scientific research. Whatever you’re passionate about ? freshwater or saltwater, big or small, beauty or science ? make your aquarium your own. Marineland Bio-Filter Balls provide a larger, multi-faceted biological filtration area to help support the growth of beneficial Bio-Spira bacteria. These filtration balls fit all Marineland C-Series Canister Filters. Biological filtration is vital to maintaining a clean and healthy aquatic environment by utilizing aerobic bacteria to eliminate toxic ammonia and nitrite. For effective biological filtration, three-dimensional surfaces are needed to cultivate beneficial bacteria. Marineland Rite-Size S and T. Each pack contains 90 Marineland Bio-Filter Balls. Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland brand has the filtration products you need to deliver on-target, advanced filtration.