Is that CNY 50 to swim in the competition pool of Water Cube?

There is no place that I can find more information about The Water Cube and The Bird Nest than this website. Thank you very much for posting the information!

I have a group of 25 people (23 teenage swimmers and two coaches)planning on visiting The Water Cube on August 5th, 2010, and would like to swim in the competition pool. Is that CNY 50 to swim in the competition pool? What kind of water test do we have to do? Can this be done on the same date in The Water Cube?

Thank you very much your for your help!