i have an 8x8x8 by blueaqua (okay 3) i don't have co2 on it (or my 6 gallon either) i looked at this one (almost got it except for that rim) ... what did you do about co2 and is it really needed on something this small?
Small size doesn't dictate co2 usage.
The amount of light is a large factor. Co2 will help plants grow and take in nutrients only when there is an excess of light.
So you really have to know your tank to decide if co2 is necessary or not.
MABJ's iDevice used for this message :p