Featured image credit: PA
We know it smells of farts, we know it's green, but as of yet we didn't know WHY it was green.
I mean, there was loads of speculation, algae, aliens (obviously, someone always blames aliens) dye and even piss.
But now it's been formally announced why an unauthorised dumping of 80 litres of hydrogen peroxide are to blame, which allowed algae to grow at a pretty speedy rate.
Gustavo Nascimento, director of venue management (you're doing a great job there, Gus) told reporters that although hydrogen peroxide is used to clean pools, it shouldn't have been mixed with chlorine. "We were not consulted; our contractor's failure is our failure," he added.
As soon as the water turned green officials ran tests to check it was safe and none of the athletes who used the green pool complained of any side-effects...and surely they'd be glad to suddenly grow webbed feet in their line of work, anyway.
The pool next to the green pool, which was used for water polo, did get some complaints however, with competitors saying the water left them with stinging and itchy eyes. This pool is being drained, whereas the green pool is going to continue being treated in hopes that it will be ready for later on next week.
Words Claire Reid