Hello! I purchased a male koi betta from a Petco two days ago. He is currently living in a two gallon filtered aquarium. Yesterday I noticed him laying on the floor of the aquarium, but I assumed he was just sleeping. Today when I woke up he was covered in a sort of fuzzy substance, which I assume to be fungus, and still laying on the floor of the aquarium. Sometimes he will get up and swim around. I want to do something to prevent him from dying, but I don't know what to do. Please help!

Updated On June 16th, 2017

Pet's info: Fish | Unknown - Fish | Male

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

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If you set up your tank and added Cola the same day, it is likely you are having water chemistry issues in addition to a fungal infection. Tanks should be set up and run for about 4 weeks before adding fish. This allows the tank to cycle. This means beneficial bacteria will populate the filter and substrate. It is important because they rid the tank of toxins such as ammomnia and nitrites. Since he is in the tanlk already, you can use a quick start product to jump start the nitrogen cycle. You can purchase this at the pet store. You will also need an antifungal medication. Follow label directions carefully. Make sure water temp is between 78 and 82 F and use a low flow filter to prevent a strong current. Partial water changes (no more than 30%) may be necessary to reduce ammonia and nitrite levels until the tank has cycled. Used aged or conditioned water that is temperature matched.

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