your cichlids are being picky, and this is not unusual whatsoever.
Starve the bastards for 3-7 days, then throw some of your new food in, and they will obligingly eat and never give you trouble again. Might take 2 weeks, but I doubt it.
some fish take longer than others. I had a female JD and a senegal bichir who both went for a month without food when i switched pellet brands on them. They broke down though, yessir!
My fish pull that bs on me every time I've ever switched foods on them. But a little time and hunger will do the job.
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