Neat looking tank, I've always wanted to go with some kind of ruins or archaeological theme, statues are neat too, I never thought of doing that but it looks nice.

If that hygro is anything like mine it will take off with the co2 but it really sucks up nitrates too.... I can cut all mine down to half the tank's height (tank is 18" tall) and within a week I have to prune again because it's blocking light from the other plants because it's grown to more than the height of the tank again and all bunching up around the surface.