It does look pretty sparse, doesn't it? My female RES is 8" long, 7" wide, and that's just her shell. Her neck is about the size of a baby's wrist. My male RES has a 6" shell. I'm finding they really like all the space they have to swim in, so I took out the thing that was bothering her from Saturday. I just ordered some duckweed and some anacharis. I was going to put someething short in it for them to "rest" upon, but that just gets in the way of their swimming, so I think for now I will just go with a few plants. If they were smaller, I could really go to town with decorating. But they're big. Really big.