about ready to start putting the 120 together... im thinking of painting the back and sides black, but im worried it will darken the tank to much? planning on useing a rough natural sand ( same stuff my rays are on atm) and moving the dw from the current set up. im thinking itll be too dark... but what if i add some java fern or anubius on the dw for some color? im big on the natural set up... but i want to compliment my cuban and floridas colors/patterns.