Hello, I actually finished setting up my 55L tank today and would be more than happy to show a pic.
Heh it's a bit cloudy cause I just filled it up, should settle in a couple days.
Mind you this is a totally fresh tank, nothing was in it before and bought everything relatively recently so nothing has had time to establish itself so may look a bit bare for a few months haha. But yeah, the look I am going for is a creek/river bed, on the drift wood I have tied on
Erect Moss, I have Java Moss tied down onto a couple pieces of slate on the substrate and I have a few grasses planted in the back near the return pipe.
The plants don't look like much atm but give them a few months of plant food and Co2 and they should look amazing (fingers crossed)
So yeah, with the layout I found that river/creek beds usually have the grasses toward the side or back walls and the main piece on one side, with the middle clear. I find it effective other might not, it's totally up to you and what kind of theme or image you want.
I hope I have helped you get some imspiration
PS. Also I will be posting progressive photos on my tank until it reaches the image I initially wanted