The reasons why arowana jumps out of the tank:

1. The water quality is not good. Sometimes, the arowana jumps out of the tank simply because the water quality is so poor that it cannot adapt.

2. Predating insects. Arowana is a pelagic fish that often moves in the upper layers of the fish tank. If there are some insects on the water, the arowana may jump into the tank to prey on these insects, such as mosquitoes, etc.

3. The water level is too high or the cylinder cover is too tight. It is possible that the water level is too high. At this time, they will see water droplets on the lid and mistakenly think that there is food, and they will jump into the tank. It may also be that the lid is too tight. At this time, their breathing is blocked and they will jump out of the tank.

4. Being frightened. If the arowana is suddenly frightened, it may jump out of the tank. Specifically, there are many situations, such as sudden loud noises, sudden strangers walking by, etc.

5. Sick. A very possible reason is that they are sick and have uncomfortable symptoms. At this time, they may also jump out of the tank.

Methods for dealing with arowana jumping out of the tank:

1. Improve the water quality. If it is caused by poor water quality, you can change part of the water, but not too much water at one time. If the water quality is still relatively dirty, you can use a filter.

2. Adjust settings. If the water level is too high, the water level can be lowered appropriately. If the cylinder head is too tight, you can leave some gaps.

3. Avoid being frightened. If it is caused by fright, you can pay more attention, especially for arowanas that have not adapted to the surrounding environment, and do not let them be frightened.

4. Timely treatment. If the arowana is sick, it needs to be treated immediately, and if the symptoms are severe, special drugs will be needed.