Solutions to yellowing of koi fish tank water:

1. Feed regularly. Breeders need to control the amount of feeding, and it is best for the koi to finish it within ten minutes to ensure the nutrition of the koi and at the same time avoid food residues from polluting the water quality.

2. Clean up feces. Breeders need to clean up the feces at the bottom of the fish tank in time to prevent the water from turning yellow and the feces from breeding bacteria, which will affect the health of the koi.

3. Deal with landscape objects. It may also be because there are sunken wood in the landscape in the water. The sunken wood will cause the water to turn yellow. The breeder needs to take the sunken wood out of the fish tank, steam it with water several times and then put it back into the fish tank.

4. Change the water. Regularly replace 1/3-2/3 of the fish tank with new water that has been dried and diluted with new water. Pay attention to keeping the temperature of the new water consistent with the temperature of the water in the tank.

5. Adsorption. Nowadays, there are many products for yellow water in fish tanks, such as activated carbon, magnetic fiber, protein cotton, etc. Their essence is adsorption, which can absorb the pigments in the water in a short time and store them inside the product.