08/09/2016 13:42 EDT | Updated 08/10/2017 01:12 EDT

Green, not gold, colour of day at Olympic diving pool

RIO DE JANEIRO — Green, not gold, was the colour of the day at the Olympic diving venue.

Sure, China won its third consecutive gold medal on Tuesday, but the buzz was about the colour of the water in the diving pool — a murky green.

That's in stark contrast to the pool's previous day's colour and also that of the clear blue water in the second pool used for the water polo competition.

British diver Tom Daley, who earned bronze in men's synchronized 10-meter on Monday, tweeted a photo of the two pools next to each other and captioned it, "Ermmm...what happened?!"

Water quality has been a major issue surrounding the Rio Olympics, but in the ocean and lagoons, not the venue pools.

A statement from Rio 2016 organizers says water tests were conducted and there is no risk to athletes. Organizers say they're investigating what caused the colour change.