1. Lying in the tank: Causes: Arowana is in a state of urgency, mostly caused by fright; substantial changes in the breeding environment; other diseases. Treatment method: Keep the water quality stable, avoid a large number of water changes, and sudden changes in the surrounding environment, try to avoid abnormal sounds and sudden changes in the scenery around the breeding area.

2. Saprolegnia: Causes: poor water quality or too long interval between water changes, etc. Treatment method: use 0.04% table salt and 0.04% baking soda mixture in the whole pond for the diseased fish pond. size: 1em;>Apply 4% sulphur alcohol to the affected area.