Smell? What smell? If you treat the water just like you do in your fish aquarium it won't smell at all. Stinky water is a result of bad husbandry, it no different if you have fish or turtles.
Slap a black background on that puppy and it'll really pop! My mom is afraid of having the turtle climb out, so I've never been able to have one. I'm content with fish
How big is your RES, from the picture she looks around 7-8 inches. May I ask what sort of filter, heater and lighting fixtures you use? My RES is closing in on 5 inches and I want to start planning for the inevitable upgrade.
My RES is about 6 inches long. I use a Rena xP3 for a filter and a 250W Stealth heater because they're made of thermal plastic so the turtle can't break it like it might with a glass heater. I use a Reptisun 2.0 UV compact fluorescent bulb and Zoomed basking light. I've also added a 48" aquarium light that's not in the pic for some extra light in the tank.
Oh, BTW I use no name fixtures. I found a double bulb fixture (on the left in pic) on sale and got it. Each side is only rated for 40W but it suits my usage.