The site for the sailing events Qingdao, had an outbreak of algae recently but now it appears to have been cleaned up and is ready for the games.

“Now it’s totally different from several days ago. It’s hard to find the green algae, especially in the Olympics sailing site,” Wang Haitao, vice president of the sailing committee for China’s games organizing committee, told the Associated Press by telephone.

Soldiers and volunteers were used to help clean up the algae.

“Yesterday, we sent out 1,700 fishing boats to search for algae over the whole sea area in Qingdao, but they only got 10,000 tons,” Wang said. “Compared with days before, that’s big progress.”

In the absence of having pictures for Qingdao, I found this one of a man cleaning up the algae at the Summer Palace in Beijing.

Read more: China: Olympics sailing site is algae-free