Pondmaster offers submersible UV Clarifiers with the glowing monitor halo ring that immediately shows it's working. The only UV lighting that's submersible! It can also be placed outside the pond. Lamp life is approx. 9,000 hours. Replace UV Bulb every year for best results!
The 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.