1. Do you need oxygen to raise a fish in a fish tank It doesn't necessarily need oxygen to raise a fish in a fish tank. Whether oxygen is needed or not depends mainly on the size of the fish tank and the variety of fish. If the fish tank is small and contains very limited oxygen, the fish's breathing will be affected without oxygen, so it is necessary to oxygenate it. If the fish raised is the kind of larger fish, the consumption of oxygen is already very high, and it is necessary to get oxygen in time, otherwise it will be detrimental to its health.
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.
