Im excited to say I am completely overhauling the stocking for this tank.
-Pair of GBR
-10 Rummynose tetra
Now I'm just thinking about that 2nd school. Im heavily leaning towards about 8 Black neon tetra. Tell me what you guys think
I love rummynoses. For what it's worth, changing the shape of your next school may look a little better - some contrast in the aquarium rather than some black neons, which have the same shape.
Perhaps consider a group of white tip tetra's (hyphessobrycon bentosi). They have a much taller body and are very peaceful. Just keep in mind you'll need at least 7 to keep them happy, so take a look at your stocking levels before committing.
I've got 11 of them with 10 CPDs and they look wonderful - albeit my tank is pretty different. I'll get some photos of them uploaded to my tank journal here in the next day or so: