Description Boost Your Greenwater Culture with Premium Nutrients! Guillards F/2 Concentrate Fertiliser Specially formulated to deliver essential nutrients and boost algea growth. Mainly used in the growth of marine phytoplankton and diatoms, Guillards F/2 is the ultimate choice for professional and hobbyist growers alike. Dosage: Add 1 mL of fertiliser per 1 liter of phytoplankton culture volume.  Key Benefits: Easy-to-use concentrate form in a dropper type bottle Suitable for most phytoplankton types Can make up to 100 litters of phytoplankton  culture Balanced nutrient profile for optimal algae growth. Contains all necessary nutrients, trace elements and vitamins This advanced concentrate formula contains everything needed for optimal algal growth and comes in an easy to apply dropper type bottle. Simply add 1ml of fertilizer to 1 liter of culture volume. For advanced and tubular reactors with much higher algal concentrations you can use at 2 to 3 times the concentration without harm. Shake well before use. Store in a cool dark place.   . Please leave this field empty Don’t miss special sales & discounts! We never spam! Read our privacy policy for more info. Thank you! Please check your inbox or spam folder to confirm your subscription.