Modified Guillards f/2 formula – phytoplankton fertiliser


Due to its contents it is fully reef safe, this is important as the phytoplankton it will create will be added to your tank.


Can be used to culture phytoplankton safely, with far less chance of crashing than use of a regular fertiliser.


Dosage is 1ml of f/2 formula per 2.5 litres of culture water.  This is full strength f/2 formula.

Comes with a pipette for easy measuring. Comes in a resealable pouch, you can add a bottle if you prefer this for storage for an added cost.


100ml is enough to culture 250 litres of phytoplankton!

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50ml, 50ml with bottle, 100ml, 100ml with bottle, 250ml, 250ml with bottle, 500ml with free bottle, 1 litre with free bottle