Gotta agree with the rest. If you are looking for a 'natural scene' then you gotta lose the fake plants (replace with live ones like java fern, anubias, crypt, etc.) and lose the pot. Place the rocks naturally, not stacked on top of one another, and hide the filter on the back by either painting the back (black or blue) or getting a 3D background. In the other tank lose the black/red gravel too.
Nice stock though.