100 bio-filter balls for aquariums, water purification biological balls, 16mm, filter media nitrification magic balls with cotton

Material: PVC. Light weight but tough enough to maintain its shape, never degrade or wear, wear-resistant, reusable, long service life, easy to handle and clean, can promote gas exchange and increase dissolved oxygen content, the design is porous. Biosphere is a kind of hollow sphere made of plastic materials. It has a large surface area. The hollow structure can break the water into small streams and break up large pieces of dirt, and the filtering effect is excellent; the internal biological sponge provides more surface area. The bio ball of aquarium filter helps to clean water naturally; in addition, the internal bio sponge provides more surfaces, thus improving the filtration effect and stabilizing the water quality, which is suitable for different types of filters. It can be washed gently with the organic matter in the dechlorinated water to remove the debris and refresh the biosphere. It can also be used in bulk or in mesh bags with plastic zippers. The biosphere is light and easy to carry. It can be used not only in the biochemical filtration system in seawater, but also in the biochemical filtration system in fresh water. The package includes: containing 100 filter biological balls, enough for use and replacement, the diameter of each biological ball is 16mm / 0.63 inch; large volume provide a large surface area, which can easily clean, promote gas exchange and increase dissolved oxygen level; Wide range of applications - plastic biosphere is an excellent medium for various types of filters, suitable for Koi and water gardens, ponds, freshwater fish tanks, salt water aquariums, fish ponds, fish hatcheries, etc.