Aqua Algae 8oz Guillard's F2 Concentrated Formula – Phytoplankton Enrichment

Overview

Aqua Algae 8oz Concentrated Guillard's F2 Formula is a nutrient-rich enrichment designed to support marine phytoplankton cultures. Built on the Guillard's F/2 concept, this blend delivers essential macronutrients, trace minerals, and vitamins in a clean, silicate-free mix. It’s formulated to be reef-friendly when used as directed and aims to help you grow dense microalgae cultures for feeding copepods, rotifers, and corals.

High in essential vitamins, this concentrated solution can help you maintain a steady, nutrient-dense culture. Because the formula is concentrated, a little goes a long way, which can translate to more efficient hobbyist use. An 8 oz bottle offers roughly 230–240 liters of culture at F2 strength, making it a practical choice for reef-keepers who want a reliable, ongoing food source for their system.

What makes it work

The product is based on Guillard's F/2 formulation, combining core macronutrients with trace minerals and vitamins (B1, B12, Biotin) to support microalgae growth. The silica-free composition helps minimize the risk of diatom blooms in display tanks, keeping reef inhabitants in mind as you manage enrichment for your cultures.

• Silicate-free and reef-safe when used as directed.
• Contains essential vitamins and minerals to support robust phytoplankton cultures.
• Ultra-concentrated—one bottle can continuously feed your cultures for weeks or months.
• Cost-effective alternative to buying frequent small bottles of live food.

How to use for best results

Working with the F2 formula is straightforward. Mix fresh saltwater to the recommended density, then dose and light your starter culture to encourage growth.

• Dosing: add 1 mL per 1 L of fresh saltwater (or 2 mL per 2 L) at an SG around 1.019.
• Add your starter culture and provide light for about 16 hours per day.
• Shake the bottle well before each use to ensure uniform distribution of nutrients.
• Keep the container in a cool, dark place when not in use.
• One 8 oz bottle supports roughly 230–240 liters of culture at F2 strength.

Practical benefits and usage ideas

For hobbyists, the ability to culture your own live microalgae can mean a steadier supply for copepods, rotifers, and corals, with the potential to reduce recurring costs. The concentrated formula is designed to be easy to integrate into existing culture routines, providing a repeatable starting point for enrichment without a complicated protocol.

While results can vary depending on tank conditions, the combination of nutrients, vitamins, and a silicate-free profile is intended to support ongoing, healthy-looking cultures when used as part of a broader husbandry plan. Always follow the dosing guidelines and store the product as recommended to maintain quality over time.