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Tetra 18 watt Replacement UV Bulb for Tetra UV2, UVC18, BP2500-UV & BP4000-UV - Best Prices on Everything for Ponds and Water Gardens - Webb's Water Gardens
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Amazon.com: LuTrace Tetra Pond 19528 - Tetra 18 watt OEM Quality Premium Compatible UV Lamp for Tetra UV2 & BP2500 & BP4000 : Patio, Lawn & Garden
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