For clownfish, yes. For cod, Tuna, etc... no.
You need to know the fatty acid ratio the works best for your chosen species of culture. If your species needs a modified ratio, we have enrichments to accompany RGcomplete/RG Plus. But clownfish don't need any enrichment beyond what RG provides.
People falsely believe rotifers are empty shells and all nutrition is found in their stomach. Our, and our partner hatcheries, have proven that myth to be false. They indeed do pick up on what you feed, so if you feed a product such as RG, there is no need to enrich for many species, clowns included.