F/2 Algae Food is a professional-grade, two-part nutrient solution based on Guillard’s renowned 1957 F/2 formula, optimized for dense, healthy growth of both microalgae and macroalgae in saltwater or freshwater environments. Perfect for culturing phytoplankton, macroalgae like Chaetomorpha, and even biodiesel strains, this liquid format eliminates the need for weighing raw chemicals, saving time and reducing error.

Each gallon contains concentrated vitamins, trace minerals, and macronutrients in two separate solutions—Part A and Part B—ensuring long-term stability and preventing premature breakdown of vitamins or precipitation of elements. Simply add both solutions to your culture water for a complete and balanced algae-growing environment.

Part A – Trace Metals & Minerals

Formulated for optimal nutrient bioavailability, Part A provides essential trace elements used in photosynthesis, cellular function, and pigment production:

Iron (Fe): 1.3% – Supports chlorophyll synthesis and metabolic processes
Manganese (Mn): 0.034% – Activates enzymes for photosynthesis
Cobalt (Co): 0.002% – Essential for vitamin B12 synthesis in algae
Zinc (Zn): 0.0037% – Enzyme cofactor; supports chloroplast function
Copper (Cu): 0.00017% – Required in trace amounts for photosynthetic electron transport
Molybdate (Mo): 0.0009% – Facilitates nitrogen assimilation

Ingredients:

Ferric chloride, EDTA, cobalt chloride, zinc sulfate, copper sulfate, manganese chloride, sodium molybdate

Part B – Macronutrients & Vitamins

Provides the key building blocks for biomass development, energy transport, and enzymatic activity:

Nitrogen (N): 6.0% – Supplied as sodium nitrate; essential for protein and chlorophyll synthesis
Phosphate (P₂O₅): 2.0% – Supplied as monosodium phosphate; vital for energy (ATP) production
Vitamin B1 (Thiamine): 0.07% – Supports enzymatic activity and cell respiration
Vitamin B12 (Cobalamin): 0.0002% – Aids DNA synthesis and carbon fixation
Biotin: 0.0002% – Required for fatty acid synthesis and metabolism

Ingredients:

Sodium nitrate, monosodium phosphate, thiamine hydrochloride, vitamin B12, biotin

Directions for Use:

Standard Dose: Add 1 tsp (5 mL) each of Part A and Part B per 10 gallons (37.8 L) of freshwater or saltwater culture medium.
Metric: Add 1 mL each per 7.75 liters, or 132 mL each per cubic meter.
For diatom culture, supplement with 49 mg Na₂SiO₃ per gallon (or 13 mg per liter) of sodium metasilicate.

Additional Notes:

Provides the equivalent final vitamin and trace element concentrations of classic Guillard’s F/2 media
Suitable for culturing both microalgae and macroalgae, including Chaetomorpha and Nannochloropsis
Does not contain live algae—this is a nutrient source only
Store in a cool, dark place; do not expose to temperatures over 120ºF (50ºC)
For best results, maintain adequate lighting and aeration

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