Any ideas on making it better

[Awesomefazekas]

 

[Zinnib123]

Not my style but looks ok

 

[HN1]

I'm always a fan of a black or darker background.

 

[Sidman24]

Put up a black background. Take out all the plants that are purple, dark red, and such.. Replace them with greens. Maybe even real plants! They really aren't that hard to manage if you guy easy ones and I think you'll be impressed. Also put your decor that matches together in the same area. Such as the roman structures. Never put a bit object in the middle of your tank. You want that space to be open and put your decor off to the sides.