Would a black arowana do fine with a lei? Or would I have to do 3x black arowana with 1x lei to spread out aggression? I remember a member on here had 3x blacks together n he do pretty okay with them.
I had a lei with my black aro without any problems.
The black aro was already in the tank and a little bit bigger then the lei.
It depends on the fish you get and maybe your lei will be more agressive.
I dont think the black aro will be a problem.
Put the black aros in the tank and the lei a little bit later that he dont clame the hole tank for himself .