Koi fish jumping into the cylinder shows that the water body makes it feel uncomfortable or frightened. Usually, there is more water for raising koi, but too deep water often makes koi jump, so the water level must be well controlled. During daily feeding, attention should be paid to changing water and keeping the water clean and hygienic, so that the possibility of koi jumping into the tank will be reduced. In addition, because of its large oxygen consumption, it must be oxygenated at all times, otherwise it may jump the cylinder.

1. Capping: Usually, the finished cylinder purchased has a cover, but if you buy a bare cylinder, there is no cover, which has advantages and disadvantages. The advantage is that water and air come into contact, so you don't have to worry about lack of oxygen when you turn on the filter, but the disadvantage is that it is easy to jump into the cylinder, so you need to add a cover to ensure that the fish will not jump.

2. Change water: Poor water quality will also cause koi fish to jump into the tank, so it is necessary to change water properly. Usually, the frequency of water change should be determined according to the change of water quality, which should not be too frequent, but it should not be changed for a long time. Even if the water is clear, harmful substances will accumulate in it, which is not helpful to the health of fish.

3. Oxygenation: When koi is deprived of oxygen, it is also possible to jump from the cylinder. Usually, before this, the fish will float its head, so once found, it is necessary to oxygenate immediately to avoid the fish dying due to insufficient oxygen. If there is an oxygen pump at home, it is best to turn it on all day.