I was wondering if it makes a huge difference. I have used Cichlid gold and bio-gold and my flowerhorns KOK has gotten huge but a lot of people at my lfs are raving about red sumo but it is expensive. How good it is?
FH specialty food is typically just an overpriced gimmick, based on marketing hyperbole. Don't be fooled by pretty pictures on the containers, read the ingredients and use common sense.
