if the fish tank is not oxygenated overnight? If the fish tank is not oxygenated overnight, the fish will not die, but for the sake of insurance, it is better to oxygenate 24 hours a day. Although fish live in water, they also need to absorb oxygen from the water. If the dissolved oxygen in the water is insufficient, the fish will float and die after a long time. Of course, not all fish need oxygen, if the fish is relatively small, the number is not much, the usual change of water can meet the demand for oxygen.
1, goldfish: goldfish is more common ornamental fish, its size is not big, the demand for oxygen is not high, the premise is that the number of breeding is not very much. This kind of fish is bred by crucian carp, which is usually divided into four kinds, namely, grass, culture, dragon and egg, among which grass goldfish is the best to raise.
2. Guppy: Guppy is an omnivorous fish with a body length of only about 3-4 cm, so it can be raised well without oxygenation. This kind of fish has strong adaptability to the environment, can tolerate dirty water, and is widely distributed. In addition, it has a mild temperament, so it can be mixed with other small fish.
3. Betta: Betta is divided into Thai Betta and Chinese Betta. No matter which one is, it is a fish of the family Percovidae. The fish of this family has a characteristic, that is, it has a suprabranchial organ, which is an auxiliary respiratory organ, allowing it to obtain oxygen from the air when the water is anoxic, so it can be kept alive without oxygen.
