Some I've seen that I like

Mostly completely water http://www.frogforum.net/attachments...y-img_0840.jpg

Shallow water http://www.frogforum.net/attachments...bterrarium.jpg

Half & Half http://i1126.photobucket.com/albums/...rums/tank2.png

For the first one, what would be the best food for them? I usually get crickets or mealworms. I can't see them lasting in there, crickets jump and would be stuck in the water, worms would probably crawl and fall to the bottom..

For the half & half, how do you get a little division wall like that?

I think I like the second pic the best, there's room for the food to stay alive, though I'd make more water space, I want them to be able to swim.

Main question is, what kind of water filter exactly do I need?