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uv sterilizer

  1. Betta Fish Bowls, Habitats, and Accessories
    What exactly do these kill? How do they work? I have a UV bulb and lamp (used to be for my turtle), could I just put that over that tank a few minutes a day and expect the same results? Whats the difference? How many watts and GPH should a UV sterilizer have for a 10 gallon? If I used a UV...