Pondmaster Submersible UV Clarifiers feature a glowing monitor halo ring that immediately shows it's working. Each UV Clarifier / Sterilizer includes a 9000 hour bulb, water tight quartz sleeve, transformer and 18' power cord.
The Pondmaster UV Sterilizer can be placed outside the pond, and its black color makes it unobtrusive wherever it's used. Visible during the day and night from any angle, the soft blue halo shows it's working but does not detract from the beauty of your pond. These lights offer great value along with ease of use unsurpassed by any other ultraviolet sterilizer.