Update: The Olympic diving pool that turned green this week is now closed to training, CNN reported.
Philip Wilkinson, Rio 2016 spokesman, said, "We confirm that diving training in Maria Lenk Aquatics Centre pool is canceled this morning. The reason is that the water must be still so the pool can return to its blue color as soon as possible."
The Olympic swimmers will now be dry training on trampolines, and water competition training will take place later on today.
Tom Daley, a British Olympic diver, posted on Twitter, "Diving pool is closed this morning. Hopefully that means we haven't been diving in anything too bad the last couple of days!"
Diving pool is closed this morning. Hopefully that means we haven't been diving in anything too bad the last couple of days! 😷😷😷— Tom Daley (@TomDaley1994) August 12, 2016
It has been reported that the reason why the Olympic diving pool randomly turned green is because of a "proliferation of algae," an official said, according to TIME.
Olympic officials said in a statement that the change of colors in the water is not dangerous to the athletes.
"Water tests at Maria Lenk Aquatic Center diving pool were conducted and found to be no risk to the athletes' health," the statement read in The New York Times.
Mario Andrada, Rio spokesman, said, "This was because of heat and a lack of wind."
Why did the water unexpectedly turn green at the Olympic diving pool?
That’s the question that was on the tongue of athletes and Olympic officials on Tuesday, but as of yet nobody has been able to find a satisfactory answer.
The divers at the 2016 Rio Olympics landed in crystal clear blue water on Monday, but during Tuesday’s competition, something was noticeably different about the water: The pool has mysteriously turned green, so much so that British diver Tonia Couch said the water’s murky color made her unable to see her partner Lois Toulson underwater.
“I've never dived in anything like it,” said Britain's Tonia Couch, after she finished fifth alongside her partner.
Something fishy about the colour of the water in the diving pool just now. Water polo beside it quite a contrast. pic.twitter.com/0mbcrdQPGl— Orla Chennaoui (@SkyOrla) August 9, 2016
The inexplicable shade of the water contrasted sharply with the cerulean hue of the water polo pool beside it and not just generated jokes on social media but also diverted attention from the women’s 10 meter synchronized platform final.
Ermmm...what happened?! pic.twitter.com/pdta7EpP2k— Tom Daley (@TomDaley1994) August 9, 2016
Polluted water has been one of the biggest issues surrounding the Olympic in Rio de Janeiro, but mostly the concern was for the lakes and lagoons, not indoor pools.
A statement from Olympics officials said tests conducted at the Maria Lenk Aquatic Center’s diving pool found no health risks for athletes, but were unable to comment what caused the sudden change in color.
“We don't know exactly what happened. And we don't know yet why the pool changed colors. If it were green and yellow, we would know it was a patriotic thing,” organizing committee spokesman Mario Andrada joked, referring to Brazil’s national colors. “We did test the water using the same parameters we do every day, and the results were exactly the same as we got when the pool was blue.”
“No danger for divers, just not a good image for Olympic Broadcasting Services,” said FINA’s Cornel Marculescu, stating they did not know when the pool’s color will return to normal.
Some divers also stated the changing color did not bother them.
“When we were practicing to get used to this venue (the water) was always sky blue...But we’re always mentally prepared for unexpected situations,” China’s Liu Huixia, who won the gold medal with partner Chen Ruolin, told Reuters.
Unlike the Olympic officials, the Twitterverse had a lot of theories about the green water.
Our coach used to tell us as little kids: a special chemical would turn the water green if you pee in it. It worked. https://t.co/G8TBIYsQNP— Mark Spiessl (@MSpiessl) August 9, 2016
@BBCSport Green colour is caused by Copper in the local water not chlorine - copper reacts with chlorine & comes out as green, iron as red— Richard Bishop (@WellnessBishop) August 9, 2016
I figured out why that Olympic pool turned green. pic.twitter.com/4xcRGyB6HQ— Ryan Nanni (@celebrityhottub) August 9, 2016