This product belongs to the "sera Nature" product line, which does not require dyes or preservatives. A varied diet with ingredients close to nature is the best protection against deficiencies and supports the health and vitality of the fish. The Nature food types therefore contain natural ingredients such as: - Spirulina - Krill - Sustainable insect meal from soldier fly larvae (Hermetia) The seals on the front of the packaging highlight these ingredients and their quantities in the food.