Phytoplex Phytoplankton contains three species of phytoplankton and provides the necessary proteins, carbohydrates and lipids for live hard and soft corals, tubeworms, clams and other invertebrates. Contains over 3 billion cells per capful-it's 15 times stronger than the competition! Rich in the omega-3 fatty acids, DHA and EPA, useful in feeding rotifers and other plankton. Also helpful when raising larval fish. Add 1 to 2 teaspoons per 50 gallons in an area of high water flow.