Add bioavailable dissolved Fe in the high nutrient low chlorophyll-a region where Fe limit the production of phytoplankton specifically large diatoms. Note that physical processes such as mixed layer depth and eddies are important factors controlling chlorophyll-a accumulation.

Sea water has lot of nutrients and minerals. One mineral may not be sufficient for the growth of phytoplankton, now we are the one substitute like Iron the bloom occur. Some phytoplankton may require silica, other needed Iron. It is necessary to study about the present level of these substances before going for nay fertilization for these experiments. Iron fertilization is not good in bays, it will reduce the oxygen level in the aquatic systems which may affect the living organisms.