Non-sterile concentrated stocks to make up 5 litres of f/2 medium.

f/2 Quad medium contains 4x the standard f/2 nitrate and phosphate stocks is used for culturing marine algae that are struggling in standard f/2 or other media.

Click here to view or download the recipe.

Note that these stocks need to be added to filtered natural seawater or artificially made seawater, this is not supplied with the stocks.

See our information sheet on using and storing media