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  1. 2 Dead Fish Today

    Beginner Freshwater Aquarium
    Hello, I am new to owning an aquarium. I've had my 20 gallon tank set up for about 2 months, the water levels have been fine for a while now, but today my marble molly and upside down catfish died. The marble molly was struggling all morning to stay alive, she would swim for about 10 seconds...
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