id say go for several large schools of tetras, maybe 30 or so neons, 30 rummynose, 30 red serpae 30 pristella tetras.
i think a bunch of tetras for color and movement would be good but i think u need something better as a centerpiece. maybe several geos, or apistogramma, dwarf crenicichla and maybe some nice colorful gouramis as well.
bkg and clown knifefish will get to big and most likely eat any schools of tetras you have so if ur looking to have scholl of tetras, u might have to avoid some of the bigger fish
i think a bunch of tetras for color and movement would be good but i think u need something better as a centerpiece. maybe several geos, or apistogramma, dwarf crenicichla and maybe some nice colorful gouramis as well.
bkg and clown knifefish will get to big and most likely eat any schools of tetras you have so if ur looking to have scholl of tetras, u might have to avoid some of the bigger fish