1. Reason: When Arowana eats too much, they will accumulate food in their abdomen. At this point, they may not eat and sink to the bottom of the tank.

2. Treatment: Raise the temperature properly, stop feeding, and then add a proper amount of garlic to the jar. Raise the temperature to about 30 ℃, which can improve their metabolism and consume their food more quickly.

1. Reason: When the water quality is unclean, there will be a large number of harmful bacteria in the water, which will infect the body of the silver arowana at this time, thus making the arowana sick. Then, they will lie on the bottom of the cylinder.

2. Treatment method: Change water in time and add proper amount of crude salt to water. Change water once or twice a week, about one third of each time. Then, sprinkle a proper amount of crude salt into the water.

1. Reason: They are very timid. If the water quality changes suddenly or they just arrive in a new environment, they will be frightened, resulting in the phenomenon of lying down and not moving the lights.

2. Treatment: Rest and inject enough oxygen into the water. Stop feeding, because they don't eat at this time. If food is sprinkled into the fish tank, the food residue will pollute the water quality. Adding proper amount of oxygen can improve their metabolic ability.