It is better for guppy to be oxygenated during the day and stopped at night, because firstly, compared with other tropical fish, guppy's demand for oxygen is not very high, and only oxygenation during the day can meet their demand for oxygen. Secondly, guppies will rest at night, and stopping oxygen at night can make them rest better.

Finally, the oxygen flow is too large, and they have high activity during the day, so they can properly resist the flow. But at night, their activity will decrease, and if they continue to be oxygenated, they will also move against the current. Over time, it will have a great impact on their health and body. Therefore, it is good for guppies to be oxygenated during the day and stopped at night.

The oxygenation time of guppy can be determined according to the feeding density. If the feeding density is not large, it can be oxygenated for about 2-3 hours during the day. Because their demand for oxygen is not high, they can be satisfied as long as they are properly oxygenated. If the breeder's density is too high, the breeder needs to take oxygen for 3-5 hours every day. Because the density is too high, not only the dissolved oxygen will decrease, but also the water quality will deteriorate. Breeders need to increase oxygenation time and water change frequency.