arowana can't be raised in a 50-cm-wide tank, because arowana is relatively large, and their body length can reach 60-100 cm in adulthood. If they are raised in a 50 cm wide fish tank, they can only swim back and forth, and cannot turn around and turn. Especially Arowana and Red Arowana, the bones are relatively hard. Under normal circumstances, their bodies will not bend. If they are raised in a narrow fish tank, their bones may deform.

Of course, the silver arowana will be smaller and have relatively soft bones, so it can be raised in a 50 cm wide fish tank. However, it is not recommended to cultivate in narrow tanks for a long time, because too narrow fish tanks will also affect their growth and development.

A 50 cm wide fish tank can raise many fish, except large fish, medium and small fish can be raised.

1. Medium-sized fish: Breeders can choose some medium-sized fish with strong ornamental value, such as parrot fish, Luohan fish, colorful fairy fish, map fish, Thai betta fish, goldfish, koi fish and so on. These fish are highly ornamental, and the requirements for the environment are not very high, which is very suitable for family breeding.

2. Small fish: Breeders can also choose some smaller fish schools, such as guppy, Mary fish, moonlight fish, kissing fish, traffic light fish and so on. These fish are bright in color, beautiful in swimming posture and gentle in character, so they can be mixed together.