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  1. Top Fin 20 Power Filter Cleaning Procedure

    Beginner Freshwater Aquarium
    Hi, I am fairly new to the amazing hobby of fish keeping. It has been a month and it is time for a water change, and filter clean up. Now I was wondering what to do with the black bio sponge (where the beneficial bacteria are). Do I dispose of it or do I keep it there forever? Thanks Guys...
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