The main reasons for the swollen belly of koi fish are as follows:
Overeating: Overeating by koi fish can lead to a swollen belly. The breeder should immediately stop feeding and pay attention to raising the water temperature and increasing the oxygen supply to promote digestion.
Pregnancy: The belly of a female koi fish will swell after conception, which is a normal phenomenon and does not require excessive intervention.
Parasite Infection: Parasite infection can cause the koi fish's belly to accumulate water, resulting in swelling. The breeder needs to use anthelmintic drugs in a timely manner for treatment.
Ascites: Koi fish suffering from ascites will also have a swollen belly. Treatment methods include changing the water, keeping the water temperature at around 30°C, adding an appropriate amount of salt. If the symptoms do not improve, a medicated bath treatment with yellow powder or malachite green is required.
Prevention and Treatment Methods:
Reduce the Feeding Amount: Avoid overfeeding and adjust the feeding amount according to the size and activity level of the koi fish.
Regular Inspection: Regularly check the health status of the koi fish and promptly detect and deal with problems such as parasites and ascites.
Water Quality Management: Maintain good water quality, change the water regularly, and prevent the growth of bacteria.
Drug Treatment: For problems such as parasites and ascites, use appropriate drugs for treatment in a timely manner.