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Reviewed in the United States on June 12, 2025
I don't often write product reviews but felt like this was ABSOLUTELY one I needed to share. My aquarium sits by several windows and had turned completely green. Even with several water changes I couldn't get the algae under control. I was looking for a water clarifyer and stumbled upon this light. It is heaven sent. My water is clearer than it's ever been. My goldfish Gary, my snail Saffron and my algae eater Ron are doing amazing. I leave it on 24 hours a day to maintain clear water. Well worth the price.I will say READ THE INSTRUCTIONS FIRST!!Great product, highly recommend to anyone struggling with a green aquarium.
Kindle Customer
Reviewed in the United States on March 28, 2025
This thing works wonders. I was having trouble keeping my 75gallon tank from turning green. I put this thing in the filter. Problem solved.
Cleone520
Reviewed in the United States on January 20, 2025
We bought this light because our Aquarium store recommended it, We had a TERRIBLE Algae Bloom...we could not even see the fish! In less than 3 days of the light being on the water cleared up completely!
C. Stout
Reviewed in the United States on April 18, 2025
Didn’t last a year. Worked decently for a small
Jerry A. Thomas
Reviewed in the United States on March 22, 2024
After changing filters, using 50 micron polishing cloths, tank cleaners, this UV light cleared up the water in my aquarium in 3 days. I set it for 3 hours on day one. It looked like the water was a tad better but I thought it just my mind hoping it was working. After day 2, there was no doubt. By day 3, the water was completely clear. The green algae that was present for months even after partial water replacement and other remedies was gone. I intend to use the UV once a week going ahead. Make sure the UV is kept away from the fish. I placed it my filter.
jennifer
Reviewed in the United States on January 18, 2024
Anyone complaining it killed their fish did not read the instructions- DO NOT PUT IN DIRECT LIVING AREA OF FISH- it needs to be concealed from the fish such as inside the filter and it will be perfectly safe.A little bigger than I expected but was able to get it inside my HOB filter after removing an extra filter element. I had a terrible algae bloom, super green water.It took about 4 days in my 10 gal tank to become crystal clear but was noticable after 1 day.
Dan
Reviewed in the United States on June 13, 2023
I have had it in my aquarium filter for almost 3 weeks. It doesn't seem to help.
Theresa
Reviewed in the United States on November 12, 2023
I'm very upset. I had a minor alge bloom & wanted to take care of it before it was out of control. I'd heard of these so I got this on Amazon. Set it on the lowest 3 hr setting for my 20 gallon tank. Less that 12 hours later, 4 of my 6 fish were dead. The remaining 2 wont eat and dont look healthy. I took my water to be tested & other than alge, it was perfect. After speaking to the aquarium expert, these things should have a cover so only the water that cycles through it will be subjected to the UV light. Because UV light kills fish. Really wish I knew that before buying this. Not only was it a costly mistake to try to buy a cheaper UV light, but I've put so much care into my fish. I'm very upset!
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