Stainless Steel UV Light Sterilizer 12 Watts is a compact inline ultraviolet sterilizer built for small to medium fish ponds and aquaculture tanks up to 500 gallons. With its durable corrosion-resistant stainless steel housing and 12 watts of UV sterilization power at 254nm, this unit effectively eliminates bacteria, green water algae, viruses and other waterborne pathogens without chemicals, giving Nigerian fish farmers reliable water sterilization in a compact and affordable package.