BioGrubs Brand Black Soldier Fly Larvae. Natures Most Voracious Composters. Break Down Your Food Waste Quickly With BSFL. Try Live Black Soldier Fly Grubs. Put Black Soldier Flies In Your Biopod+. Free Black Soldier Flies With Each Order. BioGrubs are the newest brand of Black Soldier Fly Larvae. Black Soldier Fly Larvae (BSFL) are some of natures most voracious eaters Biogrubs LOVE fresh or rotting, fruits, veggies, even meat! BioGrubs are great composters, and are even more voracious than Red Wiggler Worms. Because BioGrubs are high in protein, they make great feeders for chickens, fish, and other meat eating pets. Each order contains 500 small grubs. Plus, FREE grubs with every order.