8 Watt Fish Mate Bulb #329 Gravity Pond Filter Bi-Pin Bulb Lamp - Used in Several Models Eliminates bacteria contamination and bacteria growth! Easy to install 8 Watt, T5, Bi-Pin, 12 inches Highest Quality Comatible Replacement for less than a Third of the Cost! Used in the Following Fishmate Models: 500 Gravity UV+Bio Pond Filter  8 Watt  Bulb #329 800 Gravity UV+ Bio Pond Filter  AN336  8 Watt  Bulb #329 1000 Gravity UV+Bio Pond Filter  AN228  8 Watt  Bulb #329 1200 Gravity UV+ Bio Pond Filter  AN337  16 Watt  Bulb #329  Requires 2 - 8 Watt Bulbs 2000 Gravity UV+ Bio Pond Filter  AN314  8 Watt  Bulb #329 Compact UV + Bio Pond Filter  16 Watt  Requires 2 - 8 Watt Bulbs Compact UV + Bio Pond Filter  8 Watt