They can be very aggressive !!
had real problems with mine.
Had to buy a complete new setup to house him.
Currently in a 180Litre tank with lots of hiding places.
and the only fish i have managed so far to add to this tank
is 2 full size angel fish and i don’t feel like they are 100% safe too.
but you could be lucky and get a none aggressive one but its not worth taking the risk unless you can cater for another tank.
if you want another f/w puffer,
go for the South American puffers !
so cute and good temper but hard to get.