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filter noise

  1. My filter is making SO MUCH noise; one fish died?! HELP PLEASE

    Beginner Freshwater Aquarium
    I'm super busy tonight and I came home from school to a dead Australian Rainbowfish and a really loud filter. I changed my filter and added more water into the tank but this didn't solve anything. The biowheel seemed to be moving somewhat slow. I took a cup and scooped water and poured it into...
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