OXYFUL 36W Non-Submersible UV Ultraviolet 21.5" Light Clarifier Lamp Filter for Aquarium Koi Pond Fish Tank

Works great helps keep my 2500 gal pond clear

We bought this to replace another uv light for our koi pond. Works great and easy to install

I purchased this before and wanted more UV light for my pond water to flow through … I have the UV lights plumbed in series because of the high flow rate of my pond pump.Pond water is now crystal clear. I have 9 koi that are between 12 to 18” long.

Looks as it should. But does not turn on. It flash’s for a split second then nothing. Amazon gives me no seller contact option . Phone number I find doesn’t work . Hope that returning it works properly . Very very disappointed with this . It would be exactly what I need if it worked

I installed this on a 55 gallon aquarium that had a large algae bloom and have many tropical fish. With in the first day it was noticable less green and was white and cloudy. After 5 days it was crystal clear. Did man filter changes on my sump but was worth it. Unit does get a bit warm at about 300-400 gal an hour flow rate.

It had all the pessary parts to make it easy to adapt to my system.

this UV light cleared my pond in 5 days from green water!!

Got the light hooked it up and running it for about six month with no results...finally took it a part and the bulb is burnt out