Reef Revolution F/2 Algae Fertiliser AReef Revolutions F 2 Algae Fertiliser is a 2 part complex chemical formulation containing essential major & minor trace elements including essential nutrients and vitamins for algae to thrive and boosts cell division. F 2 Fertiliser is an important part of raising healthy phytoplankton as healthy microalgae is a very important food source for many aquatic organisms and the phytoplankton will pass on its high nutritional value for the end user.