Back in 2013 and 2014, 3D-Fuel was working with a manufacturer that specialized in products made from algae. That company made Algae filament for us at that time. The product did not age well and produced a rather pungent odor when printed. The product was discontinued in 2014 and is no longer produced by 3D-Fuel or the manufacturer. For similar Eco-Friendly Products, please take a look at our c2renew composite line of filaments.