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Alginate Organic Fertilizer Seaweed Nutrient Extract Agriculture Use Seaweed Extract. 100% Water Solubility: Fully dissolves in water for efficient absorption by crops. Professional Manufacturer: Over 15 years of experience in agricultural fertilizer production. Flexible Packaging Options: Available in 1kg to 1MT jumbo bags, customizable to customer needs. Strict Quality Control: Three laboratories in Tianjin, Shanxi, and Shandong ensure quality. Reliable After-Sale Service: Free replacement or refund for problems caused by the manufacturer. Certified Quality: ISO and Ceres certified for international market standards.