Review on 🐠 11W Waterproof Submersible Lamp for Aquariums and Ponds - Clears Green Algae and Purifies Water (HUV-11) by Nicole Bryant

I bought this because my 120 gallon portion had a very heavy algae bloom that I couldn't get rid of. Luckily I have a sump filter so it wasn't hard to put it in the sump away from the fish. The tank was so green I couldn't even see through it! I didn't notice any changes in this sheet for the first 2 days. Day 3, on day 4 the green got a little less, I could vaguely see the back of the tank and it was still slightly green when it started working on day 4, I did a 60% water change and ALL the green was gone. !This stuff really works! For several weeks I tried doing additional water changes to get rid of the algae but nothing worked. This light worked like hell! Maybe give it a few days to start working if you have a large tank as I was afraid it hadn't as there was no change until day 31 although there was some white residue on my acrylic pan are present where the light is but it comes off when I brush it off so I'm not really sure what it is to be honest