Sera Marin Granulat (aka Granules) is the staple food consisting of carefully manufactured granules for all marine fish that eat in the middle water layers and at the bottom. Due to the carefully selected, natural ingredients such as marine algae rich in iodine, spirulina and krill, the food is very popular even with choosy fish, and it optimally fulfills their natural requirements. Healthy development, splendid appearance and disease resistance are supported. The slowly sinking soft granules quickly become smooth without losing their shape, and do not pollute the water.