I'm looking at setting up a tank for P. vittatus that will mimic a streambank with fallen wood debris, etc. I'm trying to choose between a 30 gal (36x12x17) or a standard 55 gal. I would prefer to use the 55 gal as lighting, landscaping, etc. will be much easier. My only concern is whether or not it would be too big for a few vitts. Is this a problem?