much of the described behaviors such as being over competed for food, hiding around filter equiptment, and lost tail fins sound like the result of stress and aggression. my first impresion is that by adding to the group of black skirts two weeks ago you added to thier dominance and upset the previous ballance of the tank. now that the new fish have settled in, they are taking over.


good luck, keep us posted

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Gold Coast Aquarium Society South Florida
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