Posted: Wed Jun 09, 2010 4:50 pm
The reason a turtle can drown in lower later levels is they commonly flip themselves onto their backs trying to get up the sides. They use their heads to push up and flip back over- but if the water level is too low and they are on their backs their head can get stuck underwater too long and they can't flip right side up fast enough. So they drown upside down.
You want a high water level so they can just swim around, and not flip over and get stuck. That's why it;s recommended on this site to measure the length of the shell, and have at least twice that in water depth. They swim, they can float at the surface and breath. When i redecorated my tank my turtles slept floating at the surface for a few days before they found their resting areas, and they're about 1 1/2 inch.
Also, if you can't afford a tank look online at craigslist or a freecycle site for a free/super cheap one. Just bring someone with you to look at it/help carry.
I had mine in a plastic bin for a few weeks before I could get a tank.