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help tetra' bullying

  1. Beginner Freshwater Aquarium
    hello every one im a aqua keeper at a pet supply store in auz. i have a 40L tank and have 4 serpae tetra in my tank one of them seems to be a bully to the others and all the ones that i keep at the store have no problems with each other or any of the other fish i put in there. am i having...