Algae has turned the Lincoln Memorial Reflecting Pool green again, days after its $14.8 million makeover. Take a look.

The Trump administration spent $14.8 million painting the Lincoln Memorial Reflecting Pool an "American Flag Blue." See why the pool is green again.

4 problems with manually pouring hydrogen peroxide into green reflecting pool

As the Lincoln Reflecting Pool turned green with algae, officials are now using chemicals to fix it.

Lincoln Memorial pool still green despite $16M fix

Lincoln Reflecting Pool overhaul tops $16M as algae lingers, raising questions about cleanup efforts and costs ahead of peak summer heat.
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Are algae blooms dangerous? Potential health hazards of the Lincoln Memorial Reflecting Pool turning green post-renovation

According to the National Institute of Environmental Health Sciences, algae are usually seen in natural water bodies. However, a harmful algal bloom, or HAB, grows when a major amount of toxic algae covers a water body. The excessive algal bloom is when it becomes visible to naked eyes, and the color can be green, blue-green, brown, or even red.