The answer to 'gutter guards algae growth' is that algae growth on gutter guards is a common problem caused by moisture, debris buildup, and lack of sunlight. Symptoms include green or black slimy growth that can clog the gutter system and prevent proper drainage. The best solutions are to regularly clean and maintain the gutter guards, and consider replacing them if the algae growth persists.
DIY cleaning is possible but may require special tools and safety precautions. For stubborn algae growth or if you're not comfortable working at heights, it's best to call a professional roofing or gutter cleaning service to properly address the issue and prevent future problems.