Solutions to Poor Water Quality for Koi Fish include the following:
Check and Clean the Filtration System: The filtration system is key to maintaining clean water quality. Regularly inspect and clean the filtration equipment to ensure it operates properly. This can effectively remove suspended solids, waste, and harmful bacteria from the water.
Change Water in Moderation: Replace approximately 20% - 30% of the water in the fish tank each week. This can get rid of waste without causing the fish to feel a drastic environmental change. When changing water, be sure to use treated water and avoid using tap water directly.
Control the Feeding Quantity: Over - feeding can lead to the accumulation of uneaten food and fish feces, which affects water quality. Adjust the feeding amount according to the growth stage of the koi fish and the season. It's advisable to control the amount of food so that the fish can finish it within 5 - 10 minutes.
Use Water Quality Conditioners: Using water quality conditioners such as nitrite - oxidizing bacteria can help stabilize the water quality and improve the water condition.
Test Water Quality Indicators: Regularly test water quality indicators such as pH, ammonia - nitrogen, and nitrite to ensure the water quality is within the appropriate range. The ammonia - nitrogen level should not exceed 0.1mg/L, the nitrite level should be lower than 0.2mg/L, and the pH value should be maintained between 7.0 - 8.0.
Use Nitrifying Bacteria: Nitrifying bacteria can break down organic matter into harmless substances, keeping the water clear. The effect is even better when used in conjunction with an air pump.
Add Aquatic Plants: Adding aquatic plants to the fish tank can not only provide oxygen but also adsorb organic pollutants, further improving the water quality.