Fish Mate Gravity Filter Replacement UV BulbThe Fish Mate Gravity Filter Replacement UV Bulb replaces the old or burnt out UV light in your Fish Mate Gravity Filter. UV bulbs provide an important sterilization agent to keep your tank healthy and clean. Replacement UV bulb for Fish Mate Gravity Filters Helps keep aquarium water clear and healthy Fits Fish Mate 500, 800, 1200, and 2000 Gravity UV+Bio Filters Carefully follow all Fish Mate directions when installing. It is recommended that