Just got a pintail fairy wrasse, and from researching their diet it looks like it is recommended to add vitamin enricher to frozen food (i.e. shrimp). What are some recommendations for the best Vitamin enriching products out there? Also, I already feed my fish a pretty wide variety of food (Formula 1 and 2 flakes, Formula 1 pellets, Hikari seaweed extreme pellets, frozen mysis, spirulina brine shrimp), but I also have frozen clams and mussels since I know that those are good food sources for wrasses. How often (weekly) should I be incorporating chopped up shellfish as part of the wrasse's diet?