Fluval Bug Bites Insect Algae Crisps for Small-Medium Sized Bottom Feeding Fish Food are ideal for bottom feeders and algae-eating fish. These sinking crisps combine nutrient-packed insect protein (black soldier fly larvae) with plant-based ingredients like spirulina and kelp to mimic the diet of algae grazers. They provide balanced nutrition that supports healthy growth and digestion, while their firm crisp shape is readily accepted by plecos, catfish, and other bottom dwellers. Available in Multiple Sizes