The substrate is a mixture of about 50/50 #30 grit graded sand(this is very fine I would use #20 in future), and fine aquarium gravel. I really like the look of it too, and it hardly needs cleaning because the gravel prevents impaction and the sand prevents waste from settling in to it.
yeah peacocks are classified by collection area, each collection area has a differant color pattern for the most part and they are named differant species from that. However there are some species that have multipule color patterns within the same species name. Most stores sell them as assorted anyway because they dont have properly trained employees to ID them. We have a hell of a time at work because only one guy knows them reallywell, I know them prety well and the rest are clueless lol.