I am using the phytoplankton to feed my reef system as well as use a majority of the phytoplankton for a biofuel research project. So far I have built a small cabinet to house the lighting, cultures, and other culture supplies as well as order the supplies from florida aqua farms outlined in melevsreef's phytoplankton page. The bottles contain ro/di water along with the correct amount of salt mix to create a salinity of 1.022, as well as the correct amount of micro algae grow, which is basically a mixture of trace elements. The final ingredient is the phytoplankton cells.