In winter, the temperature is relatively low, bacteria reproduce slowly, and the time for changing water can be longer. You can change the water once a week. In other seasons, it is recommended to change the water once every three to five days, because the water quality is easy to deteriorate in these three seasons, and changing the water can ensure the excellent water quality. Every time you change water, you only need to change one-third of the water in the fish tank. When changing water, it is necessary to raise the temperature of fresh water so that the temperature of fresh water is consistent with the water in the water tank. Koi fish fishpond filtration system equipment should be selected according to the characteristics of koi fish. Some merchants copied the pressure filter sand box and small aquarium filter box (bucket) to koi fish fish pond with a little modification, which is actually wrong, and there are also many hidden dangers. Swimming pool filter sand pools are mostly made of quartz sand or activated carbon, which only has the function of physical filtration, but has no function of biochemical filtration. In addition, the swimming pool water treatment depends on the assistance of drugs.
If in doubt, do not understand, you can consult the fish pond filtration equipment. The equipment is produced by a professional team, which consists of an intelligent solid-liquid separator at the front end and a biochemical filter material for cultivating bacteria at the back end. It has the advantages of high purification efficiency, small floor space, low energy consumption, durability, long service life, low post-maintenance cost, sufficient inventory, timely delivery, affordable price and perfect after-sales service.