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A family friend is moving out of town and she gave me her betta fish because she can't take it with her. I have him in a 3 gallon tank right now while I'm cycling a bigger tank for him, but I noticed this evening that his fins look a little torn. I think it may be ammonia burn? I know she had an ammonia spike in her tank recently but I'm not sure if this Betta was in that tank or not.