Aquatic Science What color light stops algae? March 3, 2026 by Tanp | Leave a Comment The color of light that most effectively stops algae growth is blue light, particularly in the range of 450-495 nanometers. While other light colors can also influence algae, blue light is absorbed most efficiently by the photosynthetic pigments in algae, disrupting their growth cycle. Understanding Algae and Light: Why Color Matters Algae, those ubiquitous green […] Read more ยป