Product name: filter ball with cotton. Product size: 26 mm with cotton Quantity delivered: 50 pieces Product color: black Product material: plastic Scope of application: for filtering Applicable method : Rinse the biochemical ball and put it into the filter This product is a high-quality biochemical ball with large volume and many voids, which strengthens the filtration and cultivation effect.It can be used with other filter materials to achieve better filtration effect. The product consists of 50 pieces of simple and practical bio-filter balls, which have a plastic construction with cotton filling high performance and are ideal for supplying oxygen to your water and gas exchange. Equipped with a mesh bag to store these organic balls. Easy to rinse and use, porous design, improve bacteria filtering effect, lightweight and easy to carry. Filter balls provide a large surface area for bacteria and thus achieve a very high level of efficiency for natural biological filtration. Enough quantity can meet your different needs. Aquarium Filter Bio Balls which are excellent for oxygenating your water and facilitating the gas exchange process. A valuable help to restore the natural quality of the water and provide the most suitable living environment for fish. Ideal for any freshwater or saltwater aquarium, or mini reef aquarium. As water flows into the interior space, time is increased by using nitrifying bacteria to achieve the biochemical filtration effect. Pond filter balls do not need to be replaced, only if they are damaged or destroyed. Suitable for UVC filters, external filters or filter ponds in the aquarium or pond. pond. It is ideal for supplying water with oxygen and carrying out gas exchange. It can help create a comfortable living environment for aquatic life. Welcome to meet