Description
Filter bio ball: Bio ball is made of high quality PVC material, never degradable or worn, wear-resistant, reusable, long service life, easy to handle and clean, can promote gas exchange and increase dissolved oxygen content, porous design. Aquarium filter mesh bag: made of high-quality nylon material. The biggest advantages of nylon are strong wear resistance, low density, light fabric, good elasticity, damage resistance, good chemical stability, alkali resistance, and acid resistance. This type


![4 Pack - 4 Inch Ring Filter Socks 200 Micron - Aquarium Felt Filter Bags -4 Inch Ring by 16 Inches Long [Long Version] - Fits Eshopps…](https://m.media-amazon.com/images/I/71Ic3I+smML._AC_SL1500_.jpg)

