480 meters - 22:10.
I'm starting to question the distance that I'm assuming the pool is. I plan on taking a tape measure to the damn thing so I can get an accurate distance. The security guard was guess-timating it to be around 20 to 25 meters.
*4/27/11 UPDATE - so I went this morning and discovered the pool is really 25 meters. So in reality i covered 750 meters in 22:10.