What kind of fish? My sunburst anthias eat it and haven’t gone for anything else yet, I’ve only had them a week.
My sunburst loves picking something out of LRS, otherwise he seems to love baby mysis -- If you can find baby mysis give that a go, V2o makes some. Just don't get their 'Soft freeze' stuff in a jar.
My fish wont eat anything from PE. Especially the mysis, no clue why... It floats by them like it's garbage.