The appropriate water temperature for one-eyebrow mermaid is 20-26 ℃. If the water temperature is relatively low, their metabolism will become very slow, which will delay their growth and development and increase their time to enter adulthood. At this time, heating rods can be used to raise the temperature. If the water temperature is too high, their metabolism will be very fast, which will make the dissolved oxygen consumption of water large, which will easily lead to their lack of oxygen. At this time, the water temperature can be lowered by adding cold water. If you want them to grow better, you must control the water temperature between 20-26 ℃. You can't raise too many fish, because too much breeding density can easily lead to lack of oxygen.

The water for raising a mermaid should not only be clean and pollution-free, but also ensure that the pH value is between 6.8 and 7.8 and the hardness is within the range of 5-25. Nowadays, families generally use tap water to raise them, because it is more convenient and convenient. However, it should be noted that tap water contains toxic and harmful substances. If these substances are not removed in time before feeding, they will easily die. If you want to raise them with tap water, you need to explode oxygen first, then put them in the sun, and finally use them to raise fish.