18W UV Bulb. BIOFORCE UV BULB 5W 9W 11W 13W UVC FOR HOZELOCK SPARE LAMP TUBE FILTER POND FISH. GENUINE HOZELOCK POND UV BULB ECOPOWER ECOMAX UVC TUBE LAMP 2500/5000 6000/10000. CLOVERLEAF 24W SMART START FISH POND UV BULB TUBE LAMP SMARTSTART KOI GARDEN.
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