My tank is 450 - so 1500L x 500D x 600H (gives you some idea of the surface area). I have 8 parkinsons, 3 red, 2 lake kutubu (blues), 4 boesmani, 2 possibly splendida females, 3 herbertaxelrodi, 4 either australis or nigrans (they don't seem to fit either picture). The parkinsons and nigrans/australis are around 7 - 8cm, the rest slightly smaller except the herbertaxelrodi who are new and about 4cm.
I also have in there 5 dwarf chain loaches who are forever nipping scales off the rainbows if they get down low in the tank, 1 black red tail shark and 1 SAE (both full size), 12 pristella tetra and 6 different types of bristle nose.
I would like to get some more blues as my tank is too red/orange