Tropical fish and cold-water fish cannot be kept together. The living habits of tropical fish and cold-water fish are very different. In addition, if they are raised in a polyculture, the water temperature cannot be controlled, and they cannot be raised well. Moreover, tropical fish usually like weakly acidic water quality, while cold water fish like weakly alkaline water quality. If they are raised in a polyculture, the water quality balance cannot be controlled, which will cause fish Children get sick and even die.

Most cold-water fish live in groups, while larger tropical fish live alone. They have a strong sense of territory and are likely to attack other fish because of their territory. Moreover, the diets of cold-water fish and tropical fish are also different, which makes it very inconvenient to raise them together.

Principles of fish polyculture

1. Do not mix ornamental fish from different origins together, because even if they are from the same origin, their habits or Preferences for water quality may vary.

2. Tropical fish should not be mixed with cold-water fish or warm-water fish. Most cold-water fish are social fish, while larger tropical fish are solitary fish. They have a strong sense of territory and are very friendly. They may attack other fish because of their territory.

3. Provide sufficient shelter, such as dense aquatic plants, some sunken wood or stones, because this can give some vulnerable fish in the fish tank a place to hide and give them enough shelter. sense of security.