0.8 percent fucoidan, a valuable polysaccharide derived from seaweed (Laminaria japonica), is present in DR. BASSLEER BIOFISH FOOD FUCO. Kelp, or seaweed, is a very common ingredient, particularly in Asian cooking. We advise using DR. BASSLEER BIOFISH FOOD FUCO for feeding, particularly when undergoing treatment for bacterial infections. You can find fascinating scientific research on probiotics, prebiotics, and phytobiotics at https://www.aquarium-munster.com/en/links/science/ DR. BASSLEER BIOFISH FOOD FUCO comes in M, L, XL, and XXL granulate sizes. All three water zones receive nutrients because the granulates in the smaller pellet size M sink gradually. This provides a fresh and well-balanced diet for bottom feeders, fish in the middle zone, and surface feeders. FUCO M, L, XL BIOFISH FOOD DR. BASSLEER Complete fish food, registration number PET6237