ANSWERS: 1
  • <h4 class="dechead">On One Hand: Size Your UV Sterilizer to Control Algae

    You need a UV sterilizer of 8 to 10 Watts for every 1,000 gallons your pond holds. This is sufficient to control algae, eliminate green water and keep your pond clear. Also, your UV sterilizer should be capable of water flow levels of half your pond size (in gallons).

    On the Other: Choose a Larger UV Sterilizer to Control Bacteria

    Many pond owners suggest increasing the size of your UV sterilizer to as much as 30 Watts per 1,000 gallons to further reduce bacterial levels. High bacteria levels can be harmful to plants and fish and having a more powerful UV sterilizer keeps bacteria levels under control.

    Bottom Line

    If your bacteria levels are under control, a UV sterilizer of 8 to 10 Watts should keep your pond water clear and algae free. If however, you have high bacteria levels, or conditions that lend themselves to high bacteria levels, consider using a more powerful UV sterilizer.

    Source:

    MacArthur Water Gardens: Tetra Pond UV Sterilizers

    peteducation.com: UV Sterilizers

    pondarama.com: Ultraviolet

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