How long was this combo done? How large was the tank? Just because it worked for someone, it does not mean it will work for the others. The only thing I agree with here is the diet.My LFS has 2 arrowhead puffers In one of their african cichlid display tanks and they seem to be getting along fine even know they are said to be EXTREMELY aggressive. They've had them for a while and I was thinking about picking one up, but they're so ugly:grinyes: plus their diets are completely different.
http://animal-world.com/encyclo/fresh/Puffers/PignosePuffer.php