Alright, I wanted to add some fishes to the indoor river of Burgers Congo and this is the species list I have so far:
True big-scale tetra
Peters elephantnose fish
Redbelly tilapia
Konye
Banded cichlid
Utaka
Angolan tilapia
Aurora cichlid
Bumblebee cichlid
Pindu
Red top Ndumbi cichlid
Altum angelfish
Can these go together and be safe with the free-roaming animals and pygmy hippos (Congo peafowl, Crested guineafowl, Great blue turaco, Speckled mousebird, White-faced whistling-duck, Snowy-crowned robin-chat, African swamphen, Greater African jacana, African lemon dove, Green crested turaco, Black-faced go-away bird, Egyptian plover, Hamerkop, Red-crested turaco, Congo dwarf clawed frog, Blue-throated agama, House gecko, West African black forest turtle)