can be raised in a 50 * 30 * 40 tank? How many koi can be raised in a 50 * 30 * 40 cm tank depends on the size of the koi. If the size is larger, the number of feeding will be reduced, and if the size is smaller, one more can be raised. Generally speaking, in a fish tank of 50 * 30 * 40 cm, you can raise 5 koi of about 10 cm, or 3 koi of 15 cm, or 10 koi of 5 cm. Of course, this is only the number of normal breeding density, if the breeder wants to raise more than a few, he needs to install oxygen pumps and filters in the fish tank, so as to ensure that they can live normally.
? Koi need oxygen, because they usually have a large amount of activity and absorb more oxygen, so breeders need to turn on the oxygen pump to ensure adequate oxygen. Moreover, oxygenation can ensure the permeability of Koi's body cells, enhance their vitality, and accelerate the growth of Koi. Many breeders think that there is no need for oxygen in the vat, which is not true. Although the dissolved oxygen in the water is enough for Koi to absorb, it can not meet the absorption of nitrifying bacteria. Nitrifying bacteria have a great effect on water quality and fish health, so oxygenation is not only to meet the oxygen needs of Koi, but also has a great impact on the reproduction of nitrifying bacteria.
