Great advice all around. At 2
wpg, you could spruce up that substrate with fourish tabs [
http://www.drsfostersmith.com/produc...N=2004+113222], or some other substrate fertilizer.
Also, I would definitely say that
CO2 will benefit you at 2wpg. It might sound like a pain, but
DIY CO2 is kinda fun to construct, and very satisfying when you see the results. Once you decide to go to 4wpg, then you could invest in HP injection.
HTH