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Can the traffic light fish live without oxygen? Can it live without a heating rod

If the traffic light fish live in a large fish tank and the breeding density is small. There is also photosynthesis of aquatic plants in the fish tank to provide oxygen, which can survive without oxygen. If the oxygen content in the water cannot make them breathe normally, they must pump oxygen into the water, otherwise the fish will die of hypoxia. If the water temperature in the fish tank can be kept between 20 ℃ and 26 ℃, it is not necessary to use a heating rod to adjust the temperature. 1、 Can the traffic light fish live without oxygen? If the fish tank where the traffic light fish live is large enough and the breeding density is small, the dissolved oxygen in the water can meet the breathing of the fish. In this case, fish can live normally even if they don't pump oxygen into the water. Moreover, the photosynthesis of aquatic plants and filters in the fish tank can also increase the oxygen content of water, so fish can survive without oxygen. However, when the fish tank is small and the number of fish is large, the amount of oxygen in the water can not meet their normal breathing needs. At this time, if oxygen is not given, the fish can easily die of hypoxia. In this case, you need to use the oxygen pump to pump oxygen into the water, otherwise the fish can't survive. 2、 Is it OK for traffic light fish not to use heating rod? The minimum tolerance temperature of traffic light fish is 20 ℃. Once the temperature is lower than 20 ℃, it may stop eating and don't like swimming. The lower the temperature, it will lead to death. In order to ensure the healthy growth of fish, heating measures should be taken when the temperature is lower than 22 ℃. A heating rod can be used to warm the fish tank. In winter, especially in northern areas, it is recommended to use heating rods to control the water temperature between 20 ℃ and 26 ℃. However, if the water temperature can be maintained within this range, there is no need to use a heating rod. (GongLuDengYuBuDaYangNengHuoMa,BuYongJiaReBangKeYiMa)