Bio-Filter Balls Black Media with Sponge Small 26mm

✅ Features: ADVANTAGES: Bio balls work as a biological filter media and give a home for beneficial bacteria where they can settle and be fed by water and oxygen. They promote gas exchange and increase dissolved oxygen levels. BIO-FILTER BALL: These bio-filter balls have lots of surface area for bacteria to colonize, the multiple channels provide a lot of water flow that allows nutrients to reach and support the bacterial colonies. EASY TO USE: In the event of excessive buildup, you may gently rinse with water from an established aquarium, if desired. Good to use in both fresh saltwater tank; offers mechanical and biological filtration with inside sponge. MULTIPURPOSE: It can be used not only in biochemical filtration systems in seawater, but also in biochemical filtration systems in freshwater. Great help to restore the natural water quality, and provide the most suitable living environment for your fishes. HELPFUL FILTRATION TOOL: For use with wet/dry filters (here is not included), to improve biological filtration. Aiding in the critical gas-exchange process that is needed for successful biological filtration. ✅ Specification: Primary material: PVC Capacity: 26mm Color: Black ✅ Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. ✅ What You Get: 1* Filter Media Balls