Seachem NutriDiet? Marine Plus Flakes now contain probiotics, which reduce waste and benefit nutrient uptake as well as the immune systems of fish and inverts. NutriDiet? Marine Plus Flakes is a premium and nutritionally balanced diet formulated to meet the requirements of all marine fish. It contains only the highest quality ingredients including fish, plankton, and shrimp. It has been fortified with GarlicGuard?, added chlorella, and Vitamin C for health and immunity. It contains a broad spectrum of all the important components needed in a marine fish diet: protein, fat, carbohydrates, vitamins and minerals.