The invention relates to a method of increasing the fish catch in the ocean comprising the steps of: (1) testing an area of the surface of the ocean to confirm that each required macronutrient is present at a first predetermined level that allows for the production of phytoplankton; (2) testing the area of the surface of the ocean to confirm that a first micronutrient is present at a second predetermined level which limits the production of phytoplankton; (3) testing the area of the surface of 'the ocean to confirm that the rate of diffusion is at a third predetermined level which allows for the production of a patch of phytoplankton; (4) applying a first fertilizer comprising said fIrst micronutrient to create the patch of phytoplankton in the area of the surface of the ocean; and (5) harvesting the fish underneath and in the area of the patch.
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