1. Do ornamental fish use oxygen all the time? It is best to use oxygen all the time for ornamental fish. There are many situations of fish farming. If it is a large ornamental fish, it consumes a lot of oxygen, so it needs oxygen for a long time to ensure its survival. Similarly, if the feeding density is relatively high and the overall dissolved oxygen is limited, in order to ensure the survival of fish, it is necessary to keep oxygenation. But if you raise small fish, or if the fish tank is very large and the breeding density is very small, you can play less oxygen or even no oxygen.
2. What kind of fish should be raised without oxygen1. Goldfish: Goldfish is a common ornamental fish, which has a long history of cultivation in China and has many varieties. This kind of fish does not have a high demand for oxygen, so it does not need special oxygenation equipment. Moreover, as a wide-temperature fish, it has strong adaptability to temperature and miscellaneous feeding habits, so it is very easy to raise.
2. Guppy: Guppy is a common small tropical fish. Because of its small size, its demand for oxygen is not high. If the breeding density is not very high, it does not need to be oxygenated. Although this kind of fish can endure the low temperature of 16 ℃, it is best to keep the temperature between 20-30 ℃, and it is easy to get sick if the temperature is too low.
3. Betta: Betta can be divided into Chinese Betta and Thai Betta. No matter which one, it doesn't need oxygen. As a fish of the family Percidae, betta fish have auxiliary respiratory organs. When the dissolved oxygen in water is low, they will swim to the water surface and take oxygen directly from the air.
