---
product_id: 598794744
title: "Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml)"
brand: "the coral ranch"
price: "£2.12"
currency: GBP
in_stock: false
url: https://www.desertcart.co.uk/products/598794744-guillards-f-2-formula-microalgae-fertilizer-concentrate-12-fl-oz
store_origin: GB
region: United Kingdom
---

# High-density cultures 12 fl oz volume Made in the USA Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml)

**Brand:** the coral ranch
**Price:** £2.12
**Availability:** ❌ Out of Stock

## Summary

> 🌿 Grow Green, Live Clean!

## Quick Answers

- **What is this?** Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) by the coral ranch
- **How much does it cost?** £2.12 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/598794744-guillards-f-2-formula-microalgae-fertilizer-concentrate-12-fl-oz)

## Best For

- the coral ranch enthusiasts

## Why This Product

- Trusted the coral ranch brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Concentrated Formula:** A potent 12 fl oz concentrate that delivers maximum nutrients with minimal effort.
- • **Unlock Nature's Power:** Harness the benefits of high-density phytoplankton cultures for vibrant plant growth.
- • **Versatile Application:** Perfect for indoor and outdoor plants, ensuring lush greenery wherever you grow.
- • **Eco-Friendly Innovation:** Sustainably sourced and manufactured in the USA, supporting local economies.
- • **Join the Green Revolution:** Elevate your gardening game and connect with a community of eco-conscious enthusiasts.

## Overview

Guillard's F/2 Formula Microalgae Fertilizer Concentrate is a high-density phytoplankton fertilizer designed to enhance plant growth. Manufactured in the USA, this eco-friendly concentrate comes in a convenient 12 fl oz bottle, making it ideal for both indoor and outdoor gardening.

## Description

F/2 Guillard’s Formula Microalgae Fertilizer Concentrate The Coral Ranch's F/2 Microalgae Fertilizer is a specially formulated nutrient solution designed to foster the healthy growth of phytoplankton using Guillard's proven formula. Derived from high-quality ingredients, this fertilizer provides the essential nutrients, vitamins and trace elements necessary for robust phytoplankton growth. The Coral Ranch’s F/2 Microalgae Fertilizer is your reliable choice for achieving high density phytoplankton cultures. Directions: Add 4ml per us gallon of freshly mixed saltwater to achieve f/2 concentration. Shake well before using. Storage: Store in a cool, dry place away from direct sunlight. Warning: Not for human consumption. Keep out of reach of children and pets. Avoid contact with eyes and skin. In case of contact, rinse thoroughly with water. If ingested accidentally, seek medical attention immediately.

## Features

- Phytoplankton Fertilizer
- Guillard's f/2 Formula
- Manufactured in the USA
- High density Phytoplankton Cultures

## Product Details

- **Brand:** The Coral Ranch
- **Item weight:** 236 Grams
- **Item form:** Liquid
- **Manufacturer:** The Coral Ranch
- **UPC:** 197644241156

## Images

![Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) - Image 1](https://m.media-amazon.com/images/I/512M1tNfPeL.jpg)
![Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) - Image 2](https://m.media-amazon.com/images/I/51T3g46LAjL.jpg)
![Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) - Image 3](https://m.media-amazon.com/images/I/618qR1TENOL.jpg)
![Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) - Image 4](https://m.media-amazon.com/images/I/617CU-zB4ML.jpg)

## Available Options

This product comes in different **Size** options.

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- The Coral Ranch - Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml)
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**Shop now:** [https://www.desertcart.co.uk/products/598794744-guillards-f-2-formula-microalgae-fertilizer-concentrate-12-fl-oz](https://www.desertcart.co.uk/products/598794744-guillards-f-2-formula-microalgae-fertilizer-concentrate-12-fl-oz)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-02*