Aquarium Filter Balls, 100 Pcs Biochemical Cotton Filter, Purification and Degradation of Toxic and Harmful Substances in Water, 16mm, for Filtering Aquariums

Function: A great aid in restoring natural water quality and providing fish with the most suitable living environment. Suitable for UVC filters, external filters, or filter beds in aquariums or ponds. How it works: As water flows through, the time it takes for nitrifying bacteria to achieve biochemical filtration is increased. The filter balls for ponds do not need to be replaced unless they are damaged or destroyed. With a macro surface area of bio-balls: enhances the effect of bacterial filtration; lightweight and easy to carry. The filter balls offer a large surface area for bacteria, thus achieving very high efficiency for natural biological filtration. High quality: Aquarium Bio Filter Balls are excellent for oxygenating your water and aiding the gas exchange process. Ideal for any freshwater or saltwater aquarium or mini reef aquarium. Wide application: Our biochemical filter balls can be used not only in biochemical filtration systems in seawater, but also in biochemical filtration systems in freshwater, making them ideal for use in aquariums, fish tanks, and fish tanks.