The water in the tank for raising koi is turbid and needs to be changed immediately. When changing water, the first consideration is to change the old water. You can take some water from the pond and use it for the koi after disinfection. If the water is new, you need to put the new water in the sun before you can use it. According to experience, water can be changed about twice a week. Only one third of the old water needs to be replaced every time the water is changed.
1. Physical turbid: The koi has a high requirement for the water quality. If the fish tank is not cleaned for a long time, or the breeding density of the koi is too large, the water in the fish tank will become turbid. At this time, it is necessary to filter out the sundries in the water, or directly replace the new water, and feed regularly.
2. Chemical turbidity: The cause of chemical turbidity may be that chemicals are added to the water, or that the feed added with chemical elements is soaked in the water for a long time. At this time, activated carbon is needed to adsorb impurities or change water directly.
3. Biological turbidity: The main cause of biological turbidity is caused by the mass reproduction of microorganisms in water. At this time, ultraviolet germicidal lamp is needed to sterilize, so as to inhibit the growth of microorganisms in water.
