that lily is pretty sweet!
As far as lighting goes, you might want to purchase a better light fixture to up the wattage. This way you can have a better variety of plants.I have the coralife 4-65watt fixture on mine. I think alamo aquatics and texas tropical usually have these in stock. Alamo has many others to choose from too.
Co2 would help the growth of plant and stop that of algae.You can purchase the co2 bottle filled at one of the local welding shops here. There is no place in SA that sell the regulator kit that goes on to it. I got my from aquairumplants.com, hasnt failed me yet.
What are you using for your trace and macros?