Aquatic Maintenance Will an UV sterilizer kill algae? March 3, 2026 by Myaya | Leave a Comment Yes, a UV sterilizer can effectively kill algae, particularly free-floating single-celled algae that cause green water in aquariums and ponds. By exposing the water to ultraviolet light, UV sterilizers damage the DNA of algae cells, preventing them from reproducing and ultimately leading to their demise. However, their effectiveness depends on factors like water flow rate […] Read more ยป