Lotus Green Genie 12500 Filter. A Koi pond especially needs sufficient filtration to ensure clean, clear, healthy water. Green Genie 12500 Specifics UV Bulb: 18W. Includes Ultraviolet lamp. Cloverleaf UV Smartstart Bulb 24W 36W 48W 72W 144W UVC Lamp Koi Fish Pond.
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