Review on 🐠 TAISHAN UV Sterilizer: 13W Fish Tank Clean Light with Timer for Aquarium, Pond, Swimming Pool - Waterproof, Submersible Lamp for Indoor Use by Joe Patterson

I've been battling aggressive algal blooms for months, this thing turned my water translucent in a few days. and 100% clear in about 6 days. The timer/ballast is not waterproof. If it's outdoors, it needs to be in some kind of waterproof container. The vendors were also very helpful when the first one got caught in the rain replacing it entirely. Now I have an extra lightbulb. I will add before and after photos.