The pool used for diving events at the Olympics mysteriously turned green Tuesday, baffling viewers and experts alike.
The pool was it’s standard, clear color Monday, but when divers reported to the pool Tuesday, they were met with an interesting mystery: a sea-green color.
Olympic officials said Tuesday they were investigating the cause and that water tests indicated that there was no threat to the athletes.
Some divers appeared unfazed by the green pool, with Mexico’s Paola Espinosa telling The Washington Post that, “We noticed it, but it didn’t smell, and nothing is left on our skin,” she said, “so it didn’t really affect us.”
Experts say that outdoor pool water can turn green with the presence of algae, which often is an indicator that the chlorine levels in the water are insufficient. Rio spokesperson Marlo Andrada told Buzzfeed News the green color was due to a “proliferation of algae” due to “heat and a lack of wind.”
Twitter users had some fun with the green phenomenon:
Olympic officials hope to have the pool back to its normal color by the end of Wednesday’s finals.
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