Which Fish Requires No Filtration? Top Low-Oxygen Species for Bowl Setups
Some fish thrive in tanks without filtration. Key species include goldfish, bettas, danios, and tetras. These fish tolerate low oxygen levels but need regular water changes. A filterless tank can be low-maintenance and beginner-friendly if set up correctly and cared for properly. Another excellent choice is the zebra danio, which is hardy and can live … Read more