From noob to noob I can vouch for the use of Co2. Being the beginner that I am, I couldn't see myself paying for an expensive unit so instead I went the DIY way. Look up how to online. The way your plants will respond wont disappoint you. A little cheap "Leaf Zone" fertilization bought from my LFS, a DIY Co2 reactor, and some Eco-complete substrate has sent me well on my way to the addicting world of planted tanks.
Unique looking tank so far. You have a good start. You will be obsessed in no time.