Let's get this show on the road, so I don't fall permanently behind on updates.
Danio Choprae, Glowlight danio. Maxes out at around 3 cm ( a little less than an inch) and likes water in the 6.0-7.0 area. According to one site, very rare, but I bet you we could find them, especially since they're selling on frank's aquarium currently, lol.
The Dwarf Pencilfish,
Nannostomus marginatus, a schooler who reaches usually reaches around 4 cm, but can reach 5.5cm and is apparently a jumper according to one guy. Likes a PH of neutral or under. Another site suggested that they like tannins.
The Coral Red Dwarf Pencilfish,
Nannostomus mortenthaleri. Conflicting info on this one, and it may or may not reach 2 inches, outgrowing a ten gal for a schooler-but wanted to throw this guy out there.
When the only search results that come up are frank's aquarium and this thread, you are dealing with a rare fish-the Epsi Pencilfish!
Nannostomus espi
All information found on google.com
Planned Updates:
The rest of the bumblebee gobies
The rest of the suitable rainbows
Cavefish(generally protected)
Swampfish(a type of cavefish? I need to eat)
Landgraf's Tetra(
Neolebias ansorgii)
Danio erythromicron
look at nanofish.info