Hi,i want to ask something again.recently i bought a small tank which are 60 cmx40cmx40cm.i want to keep a african fish biotope,but i never keep a specific community before,so i want to ask if these fish can get along well.i want to keep 4 congo tetras,1 leopard ctenopoma,and 1 african butterflyfish.and if in short time i buy a bigger tank,i want to keep 1 peter's elephantnose fish.can these fish get along well?thanks