seaweed extract flake 100%water soluable organic fertilizer IMO ISO9001 ... 6 Product character:Black or brown flake, water soluble, pH=8-10Main ingredient: Alginic Acid: 8-15%, organic matter≥50 ... element and microelements, cytokinin, betaine, vitamine, trehalase, amino acid.Efficacy: Improve crop's quality, enhance resistance of crops, ... DArsenic (As)N/D Natural Seaweed Extract Flake, 100% water soluble