Seaweed fertilizer contains sodium alginate appearance:brown powder or flake certifications:ISO and GB/T prompt delivery Seaweed organic fertilizer is produced by seaweed residue with biological fermentation technology, it is rich in several ocean active elements, such as seaweed polysac-choride. Alginic acid, highly unsaturated fatty acid, phycophaein, fucoidin, and also it contains some natural ...