My fish is bloated, floating at the top, and won't swim. What's wrong?

Question

My fish is bloated near the head and he won't swim. He just floats at the top and his fins hardly ever move. He only eats his food when it begins to float to the bottom of the bowl. His fins are pitiful and dull. He won't interact or flare his fins at anything. What is wrong with him? Pet's info: Fish | Unknown - Fish | Male

Angel Alvarado, LVT · Accepted Answer

Check water temperature and chemistry. Bettas do best between 78 F and 80 F. Unless the room is very warm, a small heater is typically required. Without a filter, frequent water changes are necessary to prevent elevated levels of ammonia, nitrites and nitrates. All can be toxic to fish at high levels. Use only aged or conditioned water that is temperature matched to prevent further stress or shock. Plain aquarium salt (NOT table salt) can be used as a general tonic, to reduce stress, to treat minor infection and to aid in recovery. Dissolve 1 teaspoon of salt in a cup of tank water and gently pour it into the tank. Perform daily water changes, using aquarium salt for 10-14 days. If there is no improvement, consider a broad spectrum antibiotic. You can find one in the aquarium section of the local pet or fish store. Follow label directions carefully.

My fish is bloated, floating at the top, and won't swim. What's wrong?

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