1: According to the size of the tank, the Dutch Phoenix belongs to snapper, which is territorial and should have enough space.

2. Look who advanced the tank. It is suggested to light the fish before entering the phoenix, which is easier to adapt. There are 4 Beauveria, 40 traffic lights and dozens of black shellfish in my tank. At first, there was no light fish, and the phoenix attacked the black shell. Why? The goal is too big, because it is these two creatures, and the number is small. Later, a lot of fish were added, the target spread, and the food kept up, so it was fine.

3. Water temperature: my 24-26, 26 is the best, 26 can prevent the outbreak of white spot disease. When changing water, remember that it is 1-2 degrees higher than the water temperature in the fish tank.

Do the above and ensure OK.