To solve the problem of murky water for koi fish, you can start from the following aspects:
Check and Maintain the Filtration System: The filtration system is crucial for keeping the water clear. Regularly clean or replace the filter media to ensure its proper operation. It is recommended to use an intelligent filtration system that integrates physical filtration, biological filtration, UV sterilization, and circulation aeration to comprehensively protect the water quality in the fish tank.
Change Water Regularly and in Moderation: Change water 1 - 2 times a week, each time replacing one - third or one - fourth of the water volume. The temperature of the new water should be the same as that in the fish tank to avoid causing unnecessary stress to the koi fish. Use treated water when changing water, and avoid using tap water directly.
Control the Feeding Amount: Over - feeding can lead to the accumulation of uneaten food and fish feces, affecting the water quality. It is advisable to adjust the feeding amount according to the size, number of koi fish, and water temperature to ensure that they can finish the food in a short time. Choose high - quality fish food and add some natural baits such as vegetables and fruits in moderation. This can not only meet the nutritional needs of koi fish but also reduce water pollution.
Use Water Quality Conditioners: When the water quality is unstable, you can use water quality conditioners, such as pH adjusters or biological agents like nitrifying bacteria. Follow the instructions when using them to avoid over - use.
Deal with Turbidity Caused by Chemicals: If the water turbidity is caused by chemicals, you can use activated carbon to adsorb these substances. Activated carbon can effectively adsorb chemicals and help restore the water quality.
Deal with Turbidity Caused by Microorganisms: If the water turns green, white, or gray due to the massive reproduction of microorganisms in the fish tank, you can use an ultraviolet germicidal lamp for irradiation. At the same time, feed the koi fish with EM bacteria to enhance their digestive ability. Adding nitrifying bacteria can also help restore the water quality.