The answer to 'skylight algae growth' is that algae growth on skylights is a common problem caused by moisture, lack of sunlight, and poor ventilation. Symptoms include a green, slimy buildup on the skylight glass that can obstruct light and vision. To solve this issue, you'll need to address the root causes through cleaning, improving ventilation, and potentially replacing the skylight.
For minor algae growth, you may be able to clean the skylight yourself using a mild detergent and soft brush. However, if the problem is severe or recurring, it's best to call in a professional roofing contractor. They can properly diagnose the issue, make necessary repairs or replacements, and implement long-term solutions to prevent future algae buildup.