I actually have the same question.
http://berkeley.facebook.com/album.php? ... id=1225900
Skip to the 12th and 13th photos, the turtle in question is named Pebbles. Shell is the smaller one. =)
I also know that the tank is too small, but I'm only babysitting them for a friend while she gets things sorted out at home. When I got them, they were both in one of those tiny acrylic tanks that you get for crickets, and they looked so cramped that I went to get a bigger tank for them. That was before I came on this forum, it's been really helpful!
As of now, I'm surfing the web in the hopes of finding a deal on larger glass tanks. Craigslist and ebay seem likely, but I guess we'll see what happens.