Try this web page out
I noticed with my turtle he never got out of the water I had a large platform area for basking and he never used it so I removed it. I now have driftwood in that he will occasionally climb that but mostly he hangs out at the bottom of the tank in a hut and float up to the top for air. He seems to be more active in the evening when his light is off. So I have been researching lately too. Right now I am working on building a structure out of PVC and covering it with mosses. I read that creating shallower areas will help his activeness. I hope this helps ever day seems to be a learning process with me as well.