1. Reason: The scale melting of arowana may be caused by the low frequency of changing water, and arowana prefers clean and refreshing water. During artificial breeding, if they are not changed with water for a long time, scales may melt.

2. Treatment: Breeders need to change their water regularly. If there is a filter, they can change the water about 5 days. If there is no filter, it takes about 3 days to change the water.

1. Reason: The scale melting of arowana may also be caused by lack of nutrients. If the breeder cannot supplement vitamins regularly, they will melt. In the early stage of scale melting, only serrated gaps will appear on the scales, and in the later stage, when the scales are serious, they will all rot.

2. Treatment: Breeders need to regularly feed arowana with some vegetables, fruits or other synthetic feeds. In this way, they can be supplemented with vitamins and trace elements to ensure their balanced nutrition.

1. Reason: The scale melting of arowana may also be due to bacterial infection. For example, more bacteria always breed in water or they are not treated in time after injury, which will lead to scale melting. If the scale melting is serious, their whole scales will be corroded away.

2. Treatment: The breeder needs to use oxytetracycline, penicillin and other drugs to give Arowana a medicated bath once a day for 15-20 minutes each time. Adhere to the medicated bath for 5-7 times, and the scale melting will be relieved.