I'd get dwarf cichlids. Curviceps are very underrated, pretty dwarves that are pretty cheap. Zebra plecos are insanely expensive, usually $400 per fish. I'd go with the bristlenose plecos for now. Here's what I suggest
Cories: 6-10
Bristlenose: 2
Dwarf cichlids: 2 (1 male, 1 female)
Penguin tetras: 6
Cories: 6-10
Bristlenose: 2
Dwarf cichlids: 2 (1 male, 1 female)
Penguin tetras: 6
