Nanobubble system clears algae from Lincoln Memorial Pool

The Lincoln Memorial Reflecting Pool in Washington, D.C. is now clear after a recent algae bloom, with officials crediting a newly installed nanobubble system and cleanup efforts. The clarity comes just after the Fourth of July celebrations marking the nation's 250th anniversary and follows a period of concern over the water's condition.

Interior Secretary Doug Burgum stated that the algae has been eliminated and the water is completely clean and clear. He attributed the success to advanced nanobubbler technology installed during a recent multimillion-dollar renovation of the pool. The system injects tiny ozone bubbles into the water to break down algae and organic matter. Officials said the final maintenance step involves vacuuming dead algae from the pool's bottom, a process expected to be completed within days.

The pool's water had turned a vibrant green shortly after the renovation, which included repainting the pool's bottom a color described as "American Flag Blue." Experts noted that the combination of the darker color absorbing heat and the use of nutrient-rich water from the nearby Potomac River created ideal conditions for an algal bloom. The recent installation...