It depends on what kind of fish you raise, how big the fish is, whether it is an adult fish or a seedling. Generally, green grass, silver carp, bighead carp and four kinds of fish are raised. A pond with a water depth of 2 meters has a water content of about 1300 cubic meters per mu and can raise about 500- 1000 small fish, that is,

Eco-pond imitates the outdoor fish pond in koi fish, and creates a semi-terrestrial and semi-aquatic garden landscape with foliage plants and flowing waterfalls. The establishment of ecological pool in koi fish should first determine the breeding density. Different from small ornamental fish, koi fish is larger, with more excreta, and the water quality is more difficult to maintain. Therefore, breeding density is the first line of defense for water quality control.

The suitable breeding density in the ecological tank is koi fish per liter of water 1 cm, that is, if the volume of the ecological tank is 150 liter, koi fish with the length of 15 strips 10 cm can be raised. Under the suitable density, we can not only appreciate the beautiful swimming posture of koi fish, but also maximize the space efficiency. Sufficient dissolved oxygen will also make koi fish grow well.