The hardware forum has a pinned topic that states the most common tank sizes and their dimensions... I usually head over there if I want to get any numbers first, if no info, then I'll just google it... And yea, how'd you know littlefishie was going to reply?
There can be multiple variations of tanks with the same capacity; so if it involves an expensive purchase of live rock or hardware I would wait untill you actually have the tank beforehand.
Yeah, good news to me, since i only keep four swordtails and two SAE's in my two foot tank, i guess i could add these new babies into the tank once they have grown up enough
*Begins to wonder what his 27 gallon tank capacity would be in the US gallonage?*
I think that most of the guidelines go by US gallons too, such as watts-per-gallon, inches-per-gallon, medication doses, etc, etc...and I remember reading somewhere that US gallons was the forums 'standard'.