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Replacement UV bulbs for Fish Mate Medium 25W Bio Pond Filter (mfg# 237) and Fish Mate Large 30W Bio Pond Filter (mfg# 239). The lamp UV output reduces over time. After 12 months of UV operation, the UV lamp should be replaced. Please note that the lamp will continue to give off light well after the UV output that affects algae has diminished (or stopped). It is recommended that UV lamps are replaced at the start of the summer so that they are at their most efficient when the need is greatest. |















