1. Reason: Parrot fish standing upside down in the corner of fish tank may be caused by hypoxia. Parrot fish is a hybrid fish, and its natural demand for oxygen is relatively high. If hypoxia occurs in the process of feeding, they will have more uncomfortable reactions.

2. Solution: Breeders need to get oxygen immediately to ensure sufficient dissolved oxygen in water. If there is no oxygen pump, new water can be replaced immediately, and the dissolved oxygen in water can also be increased. However, the amount of water change should not be too large, and should be controlled at one-third of the total amount of water.

1. Reason: Parrot fish standing upside down in the corner of the fish tank may also be caused by sudden changes in the environment, such as too much water change, too much fluctuation in water temperature, and the water flow impacting the fish when changing water, which will make them have stress reaction.

2. Solution: The breeder should first keep the water temperature between 25-30 ℃, keep the water quality stable, and the PH value should be controlled between 6.5-7.0. In addition, the amount and frequency of water change should not be too high, and parrot fish can recover after waiting for a few days.

1. Reason: Parrot fish standing upside down in the corner of fish tank may also be caused by being frightened. Although they are fierce in character, they are less daring. If there is a loud sound around the breeding environment, they will be frightened. In addition, some less daring parrot fish will be frightened when they suddenly turn on the lights.

2. Solution: If the parrot fish is not seriously frightened, the breeder only needs to ensure that the surrounding environment is quiet, and they can recover on their own. If the frightened situation is serious, it is necessary to transfer them to a dark and quiet environment to keep the environment quiet and stable. If conditions permit, you can cover the fish tank with black cloth to increase their sense of security.