I know I have come into this alittle too late but after reading it all. I figured atleast add acouple of things if you did'nt mind. 1st, good looking fahaka and tank. 2nd feeding him alittle bit of this and that, live crayfish, frozen krill, raw market shrimp, raw mussel on a half shell, and pellets (most will not eat them but nothing wrong adding it to their diet, imo) is much better then only feeding the pellet food alone. 3rd, remember a very large fahaka has a mighty bite and can take a huge vital chuck out of a fish, even the Dovii would not beable to do anything if his head is laid wide open or another major part of it's body. But just sayin it could happen.