My silver dragon is dying.

I have been raising arowana for nearly 10 years. Let me tell you in detail:

First of all, I don't know how long you have been raising arowana. Did you just buy it or have you bought it for a long time? Arowana is a tropical fish. Generally, the water temperature should be controlled at 28 degrees. Third, arowana is very sensitive to water temperature. You put warm water in it, which is very exciting for arowana. Generally, the temperature difference of changing water for arowana should not exceed 2 degrees, otherwise arowana will be seriously unwell. Now, don't put any medicine. Don't listen to the fish shop owner's nonsense He wants your fish to die. Buy his fish. Now, the only thing you can do is to keep the water temperature constant (28 degrees), stop eating, turn off the light, explode oxygen in the water and keep the fish quiet. According to the size of your fish tank, you can put some big salt in moderation, usually 250 grams. I hope to help arowana recover soon.