A lot of his stock has perished!Don't use his as a typical example. 99% of the time everything else is going to die and anything that doesn't is probably going to end the fahaka.
Re mbu: it really sucks watching a mbu stop using his caudal fin to swim. Which will happen in a 2’ wide aquarium. Mine passed not long after.
I’d suggest the puffers that Wes ( rare fish) is getting in. Schoudontie or something like that. Look like mini mbus.