Photo 1 of Grech CBG-500 5W UV Sterilizer Hang-On Back Filter, 10-30 gallon/132 GPH

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Photo 1 of Grech CBG-500 5W UV Sterilizer Hang-On Back Filter, 10-30 gallon/132 GPHPhoto 2 of Grech CBG-500 5W UV Sterilizer Hang-On Back Filter, 10-30 gallon/132 GPH