Why is newly renovated Reflecting Pool in Washington DC full of algae?

The Reflecting Pool in Washington DC, a historic site, has turned green with algae shortly after its recent renovations and refilling. This unexpected algal bloom raises questions about the water treatment and maintenance protocols post-renovation. The algae could be due to a variety of factors, including nutrient overload or inadequate filtration systems. This situation highlights the challenges in maintaining iconic landmarks and the importance of effective post-renovation care to preserve their integrity and appearance.