biOrb Mega 16 gal...yes or no? Aside from cost. Yes I know there are cheaper options. But I don't have much space. This seems like a way to get the most gal in a small space. You might want to say I need 20 gal. I'm sure it's ideal. Is 16 gal really that limiting for a beginner? I'm not trying to get big, complicated fish. I did see a 20 gal rectangle that was slightly more deep and less wide, but it was designed without a lid. Seems like fish would jump out and dog hair would fly in.