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GreenFree UV Clarifier

Product No. 19523

GreenFree UV Clarifier is rated 3.6 out of 5 by 14.
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Making how to get rid of pond algae for good possible! GreenFree UV Clarifiers work to keep your pond clean, clear, and free of green algae. These dependable clarifiers use ultraviolet light to destroy suspended green algae. As algae are pumped into the Clarifier they are exposed to Ultra-Violet light that destroys the reproductive ability of single celled algae. The dead algae is then pumped out of the Clarifier where it clumps and is removed by your pond's filtration system. Tetra UV Clarifiers can typically remove heavy algae blooms within five days and keep your pond algae-free long term. GreenFree UV Clarifiers are easy to conceal, durable, install in minutes, and feature a 3-year limited warranty. Includes 3/4", 1", and 1 1/4" ID tubing adapters UL listed. 15 foot power cord.


This product comes in the following sizes:
5 Watt 660 gallon/330 GPH
9 Watt 1,800 gallon/900 GPH
18 Watt 4,400 gallon/2,200 GPH
36 Watt 8,800 gallon/4,400 GPH
Rated 5 out of 5 by from works great We have had our pond since 2002 and this works great except when someone left it out all winter (Bflo NY) and it cracked. So we are replacing it with another UCV 18 and our fish will enjoy another wonderful summer. I do also use the barley bales since our pond does get full sun for a large part of the day. Just wish there was a way to stop the hair algae from growing
Date published: 2016-04-30
Rated 5 out of 5 by from Great Product and Great Service I bought this product because the filter I had with the UV light built in failed on me. The filter still works great its just the light unit no longer works, after only 3 years. I didn't want to get rid of the filter so I purchased the UVC-18 Clarifier. I had only just set it up and realized there was no Purple Light indicating that the bulb was working. I waited till evening to check incase it was a dim display or something. Still no light. The next day I unhooked it checked to make sure it was all put together and the bulb was properly installed, it was. I called the 1-800 help line and got to speak to a Tech. It appears the safety stitch was not turning the light on. The Tech told me how to fix it and it worked. Now it is working great. Hopefully it will only take a few days to get my Pond back to crystal clear status. I enjoy the sturdy construction of this unit. It feels like it will last and no cheap plastic at all. Only time will tell. I have a few other products from Tetra and all are working great. I have a Tetra pump it is still going strong even after 5 years!
Date published: 2016-04-21
Rated 1 out of 5 by from it broke after a few days it broke one me so fast. A few days and today i noticed it was just taking water and spitting it out no bulb light on. I think it made my fish die also.
Date published: 2015-06-09
Rated 5 out of 5 by from Better then expected! This is my first year having my own pond. And I was so sad and disappointed when the moment the water temp went up to 50degrees it went to solid green soup. All my beautiful goldfish and koi were nowhere to be seen except when they were right at the top to feed. My husband was fed up after a couple weeks and bought the tetra u v clarifier. I am shocked. I knew chances where pretty good that it would clear out most of the algae, but I never expected it to be so clear! It's like glass! I can even see my trapdoor snails clear as day:) And it only took 5 days for it to go from solid green to crystal clear. The timing was perfect too. We had a party this past Saturday and that was the day the water went completely clear. I still can't believe it! Now I really hope it stays like this all summer. I'll be sure to edit this in the fall and again after this winter when we plan to use it inside to winter the fish in a stock tank. I wish I would have took a picture on Monday before we put the uv in on Tuesday. But I have Thursday and Saturdays pictures.
Date published: 2015-05-25
Rated 5 out of 5 by from Excellent addition to my pond This sterilizer worked fantastically right after being installed this summer. I have suffered with thick green pond water for years and after 7 days the water went crystal clear and stayed that way all summer. Excellent product!!!
Date published: 2014-11-26
Rated 5 out of 5 by from This UV clarifier did exactly what I wanted it to do. After fighting algae for 2 1/2 yrs in my 5000 gal pond with 90 deg weather I was about to fill it in and do away with it. I had heard about a UV classifier but never looked in to it very far. I started reading about them and decided to give it one more chance and purchased a UV classifier. I was amazed. After about week or 10 days later it started clearing up and it has been crystal clear ever since and that is going on 5 weeks now. Both the fish and plants are happier now.
Date published: 2013-09-12
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