Aquarium UV Sterilizer Light Water Clarifier for Aquarium Tank - Green Algae and Bacteria Killer Lamp for Sump Filter, Pond, Swim Pool Home Sterilization (L-33CM in Length)

Absolutely amazing was very skeptical at first had tried everything but wow two days and my water is crystal CLEAR !! I have a 450l jewel rio amazing filter water changes but it still happened and it was getting worse I tried this and wow I am honestly taken back I am new to the tank world but my fishes red tail shark pleck and loach are very happy again

I have a 80l tank ish I think. It was like pea soup we have a lot of natural light and do t use the aquarium light to keep the algae down. I could not stop the green. Purine sachets, water changes. Took live plants out. Nothing. Tried this with a 3/4 soft water change. This is after 5 days. It’s clearer than a swimming pool. I did leave it on all night first night and killed 5 fish. My mistake. It’s in the filter housing space but it attracts fish at night like moths so just use it in daylight not dark or use a timer. I haven’t had it on today as the water is so clear but maybe I will use it 1-2 hrs per day but also need to make sure the prawns and snails have something left to eat. Yes it was cheap it may not last but it does work and I am happy. Very happy.

Never actually worked, plug feels very cheap and badly made, best avoided

Even though it’s small it’s done a great job . After 4 days my water has gone from green to clear. I’ve done one water change 40% and it was still cloudy, but now it’s very clear. I’ve put it behind some plants I have in the tank (110ltr) as it says to hide the light in a cover - (it doesn’t come with one)

Yes, I can understand why people get mad after it breaks. The UV light is not really suppose to stay on all day. You burn it out too quickly. You are only suppose to have it on for 2 hours or so to clear it. Usually pumps with a uv fitted have a timer to turn it on and off. I have a solution to this to make it last from 2 months to possibly a year or 2. Get a smart plug. Set it to turn on every week for 2 hours and then turn off and repeat the same process. This may help you.

The UV light steriliser worked very well and helped clear the water in my marine fish tank. Unfortunately after 3 months the light would not come on again and since there is no way to replace the UV bulb, I had to throw it away. I would expect this item to last longer as it is not the cheapest around.

works in a garden water feature

I have two of these in my sump. My tank is 6x2x2 foot and prone to algae build up. Without these UV lights the whole tank turns green. When they’re on the water is completely clear. I’ve had one of them running 16 hrs a day for 18 months and it’s still going strong. The other I added recently to give it an extra boost. One should be ample for most tanks. DO NOT put in your tank with fish as it will kill them, sump use only. If you have no sump use an enclosed UV steriliser in your tank so the light doesn’t reach the fish.