UV-C Lamp 5W for Fish Mate 500 PUV Pond Filter

A UV-C lamp loses its useful output long before it stops lighting up, which is why green water creeps back after a season or two. Replacing the lamp once a year, usually at the start of spring, is what keeps the filter clearing algae. This 5 watt tube is the correct fit for the Fish Mate 500 PUV, reference 264.