I like it as it is and it will look nicer when the foreground fills in. Even though my tank has stems to the top in the back I like the look of the open water.
As far the the Rena input tube, I don't know what they were thinking when they used that color. All the other parts included are near black. I used a piece of drip irrigation tubing and slipped it over the main tube. Zip tied at the bottom where I can't see it.