I have two RES ..... one is in a 120g the other a 90gallon. Each is set up different, due to their personalities.....
Here is my old boy, Benedicts tank, a variety of his tank set ups. He just recently underwent a habitat change.....all rock and sunken wood with sand. His basking spot is a plastic platform with walls.
That last photo has Sam and Ella in it, not Ben.
Dipstank - Also underwent some adjustments to allow for soem new aquatic dwellers. Basically the same, more plants (he doesnt eat them yet)
Hope these help you
Your canister in my experience stinks and is not suited for turtles at all. Perhaps hatchlings, but not much else. Turtles are messy creatures and that canister just doesnt cut it. Turtle health is directly related to water quality, you are better off buying XP Filters. I use those and have no water issues at all! Monthly cleaning. Also larger tanks are easy to balance and care for believe it or not.
Just remember the minimum tank requirements......10gallons for every inch of turtle (And dont forget to take into consideration that the tank has decorations that take up space)