In addition to all the natural ingredients needed for a well-balanced diet, DR. BASSLEER BIOFISH FOOD CHLORELLA includes the beneficial freshwater algae Chlorella. This algae is abundant in vitamins, trace elements (iron, selenium, iodine, folic acid, calcium), carotinoids (lutein, astaxanthin), antioxidants (beta-carotin), and essential unsaturated fatty acids (omega-3). Chlorophyll and important nucleic acids promote the process of regeneration. Because DR. BASSLEER BIOFISH FOOD CHLORELLA is easily digested, the aquarium water is hardly stressed. The granulate sizes of DR. BASSLEER BIOFISH FOOD CHLORELLA are M, L, XL, and XXL. All three water zones receive nutrients because the granulates in the smaller pellet size M sink gradually. This provides bottom feeders, middle-zone fish, and surface feeders.