99% of all fahaka puffers are killers & will murder anything even before it's let out of the bag. My friend's 4" fahaka bit an 8" pleco in half as soon as it hit the water. I do not believe a fahaka can be trained not to eat their tank mates.
There are about 1% of the Fahakas that do allow tank mates. Even though, everyone needs their own territory & the tank has to be large enough. I happen to have a 10" fahaka that was moved to a 55g (at 5") with 2 with plecos & a soft-shell turtle. Within 2 days, the whole back rim of the turtle's shell was scalloped, so he got his own tank.
He now lives in a 125g with:
12" Goldspot pleco
6" sailfin pleco
10" Yellow-finned chalcius
2 7" Clown loaches
9" Lancer catfish
5" Rainbow shark
6" Redtail shark
5" Bosmani rainbow
7" Frontosa
8" & 9" Elephant noses (18 years old)
12” Black Ghost Knife
Occasionally there is a fin nipped but all in all, he's a wimp & the Goldspot & Frontosa is always kicking him out of his cave.
After living with all these guys for years, my stepdaughter needed somewhere for her large parrot cichlid, since she was moving. I watch them for about an hour, went out that evening & within the 5 hours I was gone, it was dead--tail & eyes missing. Moral of this story: You can never really trust a fahaka!
Looks like a candy cane.
but seriously. your pufferis bad ass. show us some pics brother