---
product_id: 29144802
title: "PhytoPheed 8oz - Mercer of Montana's Concentrated Guillard's Formula f/2"
brand: "mercer of montana"
price: "$62"
currency: NZD
in_stock: true
reviews_count: 8
category: "Mercer Of Montana"
url: https://www.desertcart.nz/products/29144802-phytopheed-8oz-mercer-of-montanas-concentrated-guillards-formula-f-2
store_origin: NZ
region: New Zealand
---

# extended shelf life maximizes phytoplankton density 30+ years proven formula PhytoPheed 8oz - Mercer of Montana's Concentrated Guillard's Formula f/2

**Brand:** mercer of montana
**Price:** $62
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your aquatic ecosystem with the gold standard in phytoplankton nutrition!

## Quick Answers

- **What is this?** PhytoPheed 8oz - Mercer of Montana's Concentrated Guillard's Formula f/2 by mercer of montana
- **How much does it cost?** $62 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/29144802-phytopheed-8oz-mercer-of-montanas-concentrated-guillards-formula-f-2)

## Best For

- mercer of montana enthusiasts

## Why This Product

- Trusted mercer of montana brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boosts Fry Nutrition:** Pre-load essential vitamins into phytoplankton, ensuring your fish fry get the best start.
- • **Silicate-Free Purity:** No silicates means cleaner cultures and healthier aquatic environments.
- • **High-Density Cultures:** Achieve peak cell densities for rotifers, artemia, and aquarium dosing with concentrated formula.
- • **Trusted Growth Medium:** Guillard's f/2 formula perfected over 30 years for consistent, high-quality microalgae cultures.
- • **Long-Lasting & Efficient:** Just 1ml per liter dosing from an 8oz bottle keeps your cultures thriving longer.

## Overview

Mercer of Montana's PhytoPheed 8oz is a concentrated liquid growth medium based on the renowned Guillard's f/2 formula, trusted for over 30 years. Designed to maximize phytoplankton cell density and vitamin content, it supports optimal nutrition for fish fry and aquatic cultures. With no silicates and an extended shelf life, this efficient formula ensures healthier, high-density microalgae cultures for your aquarium or hatchery needs.

## Description

Mercer Of Montana has concentrated the Guillard f/2 formula to help you achieve high density, continuous or batch cultures of micro algae for your fish fry, rotifer and artemia feed, or to dose to your aquarium system. Hydro Algal Fertilizer, Phyto Pheed, has an extended shelf life, and using the suggested dosing of 1ml/liter, one 8 ounce bottle will last.

Review: Muy buen producto - Excelente
Review: As described - Works great!

## Features

- Guillard's f/2 formula growth medium standard for over 30 years
- Essential to pre-loading vitamins into phytoplankton prior to feeding fry
- Promotes the highest cell densities in your phytoplankton culture
- Contains no silicates

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Mercer of Montana |
| Customer Reviews | 4.4 out of 5 stars 89 Reviews |
| Item Form | Liquid |
| Item Weight | 8 Ounces |
| Liquid Volume | 8 Fluid Ounces |
| Manufacturer | Mercer Of Montana, LLC |
| Pet Type | Fish |

## Product Details

- **Brand:** Mercer of Montana
- **Liquid Volume:** 8 Fluid Ounces
- **Item Weight:** 8 Ounces
- **Item Form:** Liquid
- **Target Species:** Fish

## Images

![PhytoPheed 8oz - Mercer of Montana's Concentrated Guillard's Formula f/2 - Image 1](https://m.media-amazon.com/images/I/314bTLLkzIL.jpg)

## Questions & Answers

**Q: Hello, i am in wyoming and store my fertilizer in our mud room. can get to 30-35 degrees. i noticed my bottle of fertilizer has been leaking. is it o?**
A: Sounds like the bottle froze and cracked. Would swap the bottle and shake well before use.

**Q: How long does this stay?**
A: 6 to 12 months but keep in cool area and no light when. Not in use

**Q: Is this product organic?**
A: In a  chemistry equations this item is organic.

**Q: is it sterile?**
A: The item contains, an algae culture, the culture media was probably pure when inoculated, the term sterile refers to something that is void of contaminants, or in bacteriology a sterile can be a poisonous segment of an amoeba, bacteria, or virus.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Muy buen producto
*by H***Z on November 17, 2025*

Excelente

### ⭐⭐⭐⭐⭐ As described
*by C***T on January 8, 2025*

Works great!

### ⭐⭐⭐⭐⭐ This is a great product to culture microalgae
*by S***G on August 3, 2018*

This is a great product to culture microalgae. In the past I've used Miracle Gro with mostly failure where the culture would completely crash relatively quickly. This nannochloropsis culture got dark quickly and has remained alive for more than a 3 weeks now, there's a power head in there that you cant even see anymore.

## Frequently Bought Together

- PhytoPheed 8oz - Mercer of Montana's Concentrated Guillard's Formula f/2
- Mercer of Montana Tetraselmis Phytoplankton (16oz) Cultured
- Nannochloropsis Phytoplankton (16oz) Cultured by Mercer of Montana

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-24*