When raising goldfish, water quality is a key aspect. In order to ensure clean water quality, it is necessary to change their water regularly. The frequency of water change is affected by many factors. First of all, look at whether there is filtering equipment in the fish tank. If there is no filtering equipment in the fish tank, it is necessary to change the water once every 2-3 days. If there is filtration equipment in fish tanks, they can be changed once every 1-2 weeks.

If the temperature in the air is suitable, their metabolism is vigorous, so they can change water normally. If the temperature in the air is not suitable, such as cold winter or hot summer, their metabolism is slow, so it is necessary to prolong the time of changing water.

Goldfish is a kind of freshwater fish. Natural water and tap water such as rivers and lakes can be used to raise goldfish.

1. Rivers and lakes water: Rivers and lakes water is most suitable for goldfish growth. Before using lake water, it is necessary to confirm whether the water quality is polluted in advance, but it is troublesome to obtain this kind of water and few people use it.

2. Tap water: Tap water is a kind of water often used for raising goldfish. It is treated natural water, which is clean and convenient to use. However, the content of chlorine is high, so it is necessary to remove chlorine before use, so as not to harm goldfish. The most common way to remove chlorine is to expose tap water to the sun for three days. After chlorine is removed, the water can be put into the fish tank.

3. Well water: Well water is also a kind of water often used to raise goldfish, but the temperature of well water is relatively low, so it is necessary to adjust the temperature before use.