Guano Phosphate based fertilizer is well founded in indonesia (Original). P2O5 15% - 25% UP This High phosphorus min 8% - 10%up colour grey , brownish and light brown. citric soluble P 10%-15% up Packing : Bag 25kg 50kg 500kg and Jumbo Bags 1 tons this is safely mixed with elemental sulphur, dolomite,molasse or magnesium oxide and other products.