Why Aquarium Filter Is Used ? - An Aquarium Filtration System is An Important Component of a Healthy Fish tank , An Efficient Aquarium filter will Help Maintain good water Quality in Both Freshwater and Saltwater Aquariums. They Can help Tremendously in Maintaining Water Parameters in Between Regular Water Changes. Versatile Filter For Aquarium Fish Tank - Buraq Aquarium Internal Filter Could Supply Oxygen and Create an Aquarium Water Cycle. It Provides a Healthy living Environment , Provide Good FIlteration , Filter Circulation 400/L Hr. Leave The Water Crystal Clear - Filteration is the Heart Of an Aquarium , Fish Needs Crystal Clear Water to Stay Healthy In Aquarium , Filter Sponge Absorbs. For Maintaining - Clean The Fish Tank Ones In 15 Days Because Old Water Is Good For Fish Tank , Only Recycle 50% Water Of Tank & Add 50% New Water In Tank. Quiet Working - The Sound Level is Less than 40 DB When the Fish Tank working This Silent fish tank filter is internal noise reduction , and lets the family enjoy a Quiet life.