How Many Goldfish Can You Keep in a 20-Gallon Tank?
By A Mystery Man Writer
20G long goldfish tank. Can I have more than two fish? : r/Aquariums
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I have been told that a 20 gallon tank is a good size for 2 goldfish, but I was wondering, would it be okay to add in a cleaner fish? - Quora
3 large goldfish in what looks like a 20 gallon. : r/shittyaquariums
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