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For 50 year, fishkeeping enthusiasts have looked to the Tetra name for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need–from a large variety of quality fish food and innovative equipment to test kits and decor. Tetra is a name you can trust in the aquatics industry. With decades of proven performance and high quality products it’s no wonder Tetra is the go to brand for aquatic beginners and veterans alike. The TetraPond 5 Watt UV Bulb works for all TetraPond UV clarifiers. These high-efficiency ultra-violet bulbs for Bio-Active Pressure Filters with UV, keep your equipment bright and functioning properly. The 5-watt bulb is for up to 660 gallon ponds. Follow guidelines of replacing the bulb after 11 months. Create an environment that is the focal point of your outdoor space. Keep your pond looking and functioning well with TetraPond products.
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TetraPond GreenFree UV Clarifiers Keep Your Pond Clear and Clean
15 foot power cord makes placing your UV Clarifier easyTetraPond 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 tank’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.
The UV clarifier can significantly improve water clarityComponents
- PL-S UV bulb: Provides 11 months of continuous operation
- High clarity quartz tube
- Stainless steel insert: Reflective surface increases UV exposure. Prevents internal UV degradation of plastic housing.
- Quick release couplings
- Transparent fittings allow lamp-on check
- Mounting brackets
How it Works
- Pond water containing single-cell algae is pumped into clarifier.
- Reflective stainless steel surface increases UV exposure.
- Ultra-violet light destroys single-cell algae’s ability to reproduce.
- Single-cell algae dies, clumps, and is removed by filtration.
Long-Lasting Replacement Bulbs
TetraPond UV Bulbs should be replaced every 2 seasons or 11-months for maximum efficiency.
UV Clarifier For Ponds Up to: Bulb Replacement 5 Watt 660 Gallons 9 Watt 1800 Gallons 18 Watt 4400 Gallons 36 Watt 8800 GallonsMore Great Pond Products
, , , , , , , , , , , , , , , ,R. Rhinehart
Reviewed in the United States on May 24, 2025
Original bulb cleared up very green pond water in 4 days, could see clear all the way to the bottom of the pond. This replacement bulb has been running 2 weeks and the water is just slightly less green. I can only see the fish when they are near the surface. Can't find any local stores that carry the bulb so I am going to take a chance that this was just a bad bulb and order a new one. I will report again on what happens with the ne w bulb.
Karen G. Ayers
Reviewed in the United States on March 7, 2025
It was easy to install, good replacement bulb , lasts a long time.
Winnie Zhen
Reviewed in the United States on August 19, 2024
The UV light is amazing. The algae is gone after one week.
Al Leblanc Customer
Reviewed in the United States on May 12, 2024
Works for our pond
Laura Lake
Reviewed in the United States on September 6, 2021
I couldnt understand why the pond had gon green, til i noticed the light was out. There are two sizes.. make sure you look at the size of your current bulb, and unplug everything while changing bulb to keep the insides dry. I wiped it all down with paper towels as well. Works perfectly
Poontai
Reviewed in the United States on January 31, 2020
I like it because it can kill algae in the water, which then makes my pond very clear. My pond is 180 gallons, so if your pond is bigger, you have to buy larger watt, not the same as my UV light, which uses only 5 watt.
Osman guven
Reviewed in Canada on August 21, 2018
I amm happy
RatherLiveInKeyWest
Reviewed in the United States on August 22, 2014
Our family has had several freshwater fish tanks over the last 25 years and work hard to maintain a healthy environment for our sealife. The one challenge we face is that, since we like a house with lots of windows, at some time during the day sun will pass over the tank. While we have plenty of places for the fish to 'hide' if they desire to, we still have to deal with the resulting green algae from time-to-time. The TetraPond UVC-5 Clarifier () has been our solution for at least the last 10 years, and we would recommend it highly. This bulb is TertraPond's replacement bulb for that unit, and it does its job well.If you would like to see a picture of the Clarifier underneath our tank, go back to the unit's main sales page, scroll down to where the "Most Helpful Customer Reviews" section starts, then look to the right of that area for the "Product Images From Customers" section. Took a shot to show how it is situated.We keep the flow rate of the pump connected to this light at a moderate rate, allowing time for the UV light to do its thing as the water passes by. As long as the UV light bulb is fresh, the rig works very well and it does not leak. Water feeds from the reservoir of our bio-ball based filtration system, and passes by this light on the way back up to the tank. We try to follow the TetraPond guidelines and replace the UV bulb once a year with their bulb.This might seem overkill for a 72 gallon bowfront tank, but our fish stay healthy and live long lives, while our water remains crystal clear and algae-free.If you are looking to do something similar to improve the look and health of your tank in a fairly low maintenance manner, give the TertraPond UVC-5 Clarifier a try and keep a spare bulb in stock as the time will come when you need it.Recommended. Go for it.
Alex S. Wong
Reviewed in the United States on August 1, 2013
shipment is not as fast as promised - 6 business days I waited. I just replaced my old unit with this bulb. it is easy to do and the unit works as designed.
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