Is My Goldfish A Bully?

Tmnchick

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My roommate is very impulsive and bought this tank with fish but I'm still learning all about fish. We have 3 goldfish in a 10 gallon tank. I just changed their water and our bigger fish cowboy keeps chasing yoongI the smaller around. Our white fish fin also has developed a dark black spot on the underbelly. Help? Should I look to move cowboy??
 

SaltyPhone

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Welcome to the forum Tmnchic. First things first hop on YT and watch some videos about the nitrogen cycle. Can you provide some pics? Long term the tank isn’t going to be able to sustain three goldfish.
 

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it is breeding season, the males will chase the females around, mine have been doing that for the past few weeks.

are they single tail or fantail varieties?

goldfish will outgrow a 10 gallon very fast. make sure your tank is cycled, and that you do atleast one 75% weekly water change.

pictures will help a lot.

this is a 1yr old fancy goldfish in a 10 gallon tank, very cramped
 

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