i used to think that too because I don't only feed pellets... Therefore I have a lb of low quality pellets right now Im still trying to finish.. But lately for the past few months I've been feeding mostly these pellets. My fishes are low in colors right now.. Gonna get me 5lb of NLS when Im done..
I know GS original make your fish grow real fast lol.. No other FH food I recommend other than GS.
There are differences in the quality of ingredients I guess..
I no longer feed Pedigree or Purina to my dog either.. Only if Im broke..
Anyways, best bang for the buck is Hikari!!