The congestion of the pectoral fin of Arowana is caused by the deterioration of water quality, which leads to bacterial infection and congestion, which is characterized by redness all over the body or local redness. Treatment:

1, you can solve the problem from the water quality first. First, change the water by one-third at a time, and gradually improve the water quality by constantly changing the water. In addition, fresh water must be dry.

2. Enhance the lighting appropriately.

3, salt, take a bath with 0.3 to 0.5% salt water. Once a day for 3 to 5 minutes.