TGR PCF is a highly nutritious dried foof for corals, anemones and fishes. PCF is rich in vitamins and minerals and is made from high-quality food grade imgredients. TGR PCF does not contain any artificial preservatives. TGR PCF is best used as a monthly or bi-monthly food sourde for corals, or may be used as a supplement to TGR Omni or Herbi. Dry premixed for corals and small fishes.