The time of goldfish getting oxygen can be controlled at about 2-5 hours, but the time of getting oxygen varies with different feeding densities. If the density is normal or low, give them about 2 hours a day. Because goldfish's demand for oxygen is relatively low, only a small amount of oxygen can ensure their sufficient oxygen.

If the filter is normally open, oxygen may not be applied. However, if the breeding density is too high, the breeder needs to take oxygen for 3-5 hours every day. Because the density is too high, the demand for oxygen will also increase, so the oxygen injection time can also increase. In addition, when the feeding density is very high, it takes 24 hours of oxygen to ensure sufficient oxygen.

The time when goldfish turn on the lights should be determined according to the time when they receive sunlight. If they live in a place where they can receive sufficient sunlight, the breeder does not need to add extra lights to them. If they live in a place where they can't receive enough sunshine, the breeder needs to turn on the lights for about 5 hours every day, so as to ensure that their body colors are bright. Although light can replace natural light to add body color to them, it is best to add color to them with natural light if conditions permit. Because natural light can not only enhance color, but also sterilize and reduce the chance of getting sick.