Thanks for the compliments guys! :D
It is indeed a 5.5 gallon, I got the tank at petco, it was 10-15 dollars I think.
I did have DIY co2 going for a while but so little of it comes out and my wooden diffuser keeps growing algae that clogs up the bubbles that I don't think it is really necessary. I think the most important part was that I put the light directly over the riccia.
I'm using Amazonia as substrate in this tank. (CaribSea floramax in my other 5g which grows things just as well without being annoyingly dirty IMO)
It's a shame I have to tear it down soon as I am moving from NYC to SF and won't be able to take my fishies :(