Whoa!! Lovely start Devin!! Tell us the flora, and what are you planning on putting in there in terms of fauna? Sailfins?
That looks great! How much water do you think is in there?
There is probably only about 22 gallons of water in there, but I can add quite a bit of livestock because of the high water surface area to volume ration\, the broad footprint and the filtration by the plants.