I got warned about 'bloat' with my Africans to the point where i was actually made paranoid about it; until i realised it was just that- paranoia, but marginally justified.
Fed them what good african keepers would - spirulina this and that and sea weed and green this and what have you...
and also fed them colour bits, cichlid gold, aro pellets, bloodworms, brineshrimp and meat - what is advised against.
didn't lose a single fish, and boy were they healthy and active.
Incidentally all fish foods are 'omnivorous' in that they all contain fish meal and shrimp meal. Even the spirulina ones.