Precautions for and Successful Cases of Keeping Parrotfish in a Mixed Aquarium:
Precautions:
Territorial Awareness: Parrotfish, especially Blood Parrotfish and Flowerhorn Cichlids, have a strong sense of territory. If you want to keep them in a mixed aquarium, it's best to raise them together from a young age and make sure that the parrotfish are slightly larger in size to avoid fights.

Gentle Temperament: Parrotfish are suitable for being mixed with fish that have a gentle temperament and are of similar size, such as Oscar Fish, Silver Arowana, Fortune Fish, Golden Pineapple Cichlid, Clown Knife Fish and so on. These fish usually won't take the initiative to attack parrotfish and can enhance the ornamental value of the fish tank.
Avoiding Accidental Ingestion: The mouth characteristics of parrotfish make them prone to accidentally ingest small fish. Therefore, you should avoid mixing them with fish that are too small in size.
Water Quality and Habits: When keeping fish in a mixed aquarium, you need to pay attention to whether the living habits and water quality requirements of the fish are similar, so as to avoid water pollution and poor growth of the fish.
Stocking Density: Don't make the aquarium too crowded to prevent diseases and situations where the fish attack each other.
Successful Cases:
Flowerhorn Cichlids and Parrotfish: If they are raised together from a young age and the parrotfish are ensured to be slightly larger in size, they can be successfully kept in a mixed aquarium.
Oscar Fish and Parrotfish: When these two kinds of fish are kept together, they will grow very quickly. Moreover, the Oscar Fish has a gentle temperament and fights are unlikely to occur.
Silver Arowana and Parrotfish: The Silver Arowana belongs to the middle layer fish, while the Parrotfish are active at the bottom of the water. Keeping them together can make the fish tank more lively.
Fortune Fish and Parrotfish: Their symbolic meanings match well with those of the parrotfish, and the color combination is also very beautiful.
Golden Pineapple Cichlid and Parrotfish: When mixing with Golden Pineapple Cichlids of similar size, the fish tank will look really nice.
Dwarf Parrotfish and Angelfish, Discus Fish, etc.: Dwarf Parrotfish can be mixed with these fish that are slightly larger but have a gentle temperament. However, attention should be paid to the size of the water body and the number of fish in the mixed aquarium.
In conclusion, when keeping parrotfish in a mixed aquarium, factors such as the territorial awareness, temperament, size, water quality requirements and stocking density of the fish need to be taken into account to ensure the success of mixed keeping and increase the ornamental value of the fish tank.