The object of the present invention is an atmospheric bioremediation system focused to reduce the Carbon Dioxide content in the Earth's atmosphere. The disclosed system includes an apparatus to distribute iron in low oxidation states such as zero or plus two trough out the photic region of high nutrients low clorophylls (HNLC) oceans over a period of time. This special apparatus is needed to provide a slow and continuous release of the iron to prevent premature precipitation. It has been shown that microalgae growth is usually initiated by the addition of iron and its sustained feed in water whose only limiting nutrient to prevent algal growth is iron itself. It has also been shown that southern oceans are a possible large batch area where iron is the limiting nutrient.