The water quality in the fish tank can be adjusted by exposure. In this way, while improving the water quality, enough oxygen can be input into the water to promote their metabolism. You can also plant some aquatic plants, algae and other plants in the rewater. Because they will play a role in purifying water quality, they can also release dissolved oxygen through photosynthesis.
2. How to raise goldfishAt the beginning of raising them, pour trapped water into the fish tank, which can reduce the chlorine content of the water, thus reducing the probability of their illness. It is also necessary to ensure that the PH value of water is between 6.5 and 8.2 and the hardness is about 7. Because goldfish belong to wide-temperature fish, their water temperature adaptability is relatively strong, and the water temperature can be kept between 20-35 ℃. Then, it is necessary to ensure that the water quality does not mutate, which can reduce the chance of their illness. Change water regularly, two to three times a week, about one third of each time. If you are in cold winter, you should also use a heating rod and a thermometer to raise the water temperature. They can also be sprinkled with mosins in water without affecting their health.