Pondmaster offers submersible Ultraviolet Clarifiers with the glowing monitor halo ring that immediatly shows it's working.
1 halo ring
Max flow 600 GPH
9000 hour bulb
18' power cord
Max pond size 1500 Gallons
6 lbs
3/4" barbed inlet - outlet
The only ultraviolet light that is submersible, it...