Fish fertilizer is made from whole fish and carcass products, including bones, scales and skin. Rather than let unusable fish products go to waste, these items are converted into nutrients for the garden. Different types of fish, such as menhaden and anchovies, are ground into a slurry. This product is then processed to remove oils and fish meal, which are used for other industries. The liquid that remains after processing is fish emulsion. After straining out solids, sulfuric acid is added to lower the pH, preventing microbes from growing. The fish fertilizer is then stable to package and ship for use in the garden.
