This original equipment Aquatop UV Replacement Bulb is a highly efficient and effective. Designed specifically to replace the existing bulb in the IF7-UV Internal Filter with UV. Help keep your water crystal clear, clean and healthy with these UV bulbs. Replace every 6 to 12 months. Original equipment designed for the IF7-UV Efficient and effective Good for 6 to 12 months Includes inline switch for UV lamp

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