If koi fish jumps and falls, it needs to be put back into the fish tank in time. There are many reasons for koi fish jumping, probably because the water is too deep, so the water level can be lowered appropriately. It may also be because the water quality is not good, so it is necessary to change water regularly, which can improve the water environment. In addition, when there is insufficient oxygen in the water body, koi may jump out of the cylinder, so it is best to prepare an oxygen pump for oxygenation.

1. Capping: Usually, the finished cylinder purchased has a lid, but if you buy a bare cylinder, there is no lid, which has both 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 cylinder, so you need to add a lid to ensure that koi 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 may jump from the cylinder. Usually, koi will float its head before this, so once it is discovered, it needs to be oxygenated immediately to avoid the death of koi due to insufficient oxygen. If there is an oxygen pump at home, it is best to turn it on all day.