---
product_id: 48334390
title: "Reef Phytoplankton, 250 mL / 8.5 fl. oz."
brand: "seachem"
price: "€ 28.35"
currency: EUR
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.pt/products/48334390-reef-phytoplankton-250-ml-8-5-fl-oz
store_origin: PT
region: Portugal
---

# Optimized for all aquatic life stages 250 mL premium liquid formula Proudly made in the USA Reef Phytoplankton, 250 mL / 8.5 fl. oz.

**Brand:** seachem
**Price:** € 28.35
**Availability:** ✅ In Stock

## Summary

> 🐟 Elevate your reef game with every drop!

## Quick Answers

- **What is this?** Reef Phytoplankton, 250 mL / 8.5 fl. oz. by seachem
- **How much does it cost?** € 28.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/48334390-reef-phytoplankton-250-ml-8-5-fl-oz)

## Best For

- seachem enthusiasts

## Why This Product

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

## Key Features

- • **Pure American Quality:** Manufactured in the USA to ensure top-tier safety and potency.
- • **Effortless Aquarium Boost:** Simple daily dosing keeps your reef thriving with zero hassle.
- • **Universal Pet Compatibility:** Formulated for all life stages, supporting every aquatic pet’s vitality.
- • **Exceptional Value for Enthusiasts:** Premium reef care without premium price—join thousands who trust this bestseller.
- • **Nutrient-Rich Phytoplankton Blend:** Power-packed with Thalassiosira Weissflogii, Isochrysis, and Nannochloropsis for vibrant aquatic health.

## Overview

Reef Phytoplankton 250 mL is a nutrient-dense liquid supplement designed to enhance aquatic pet health across all life stages. Made in the USA, it features a potent blend of microalgae species that support vibrant reef ecosystems. Easy to dose and highly rated, it offers exceptional value for aquarium enthusiasts seeking reliable, daily reef nourishment.

## Description

Product Description This product is easy to use. This product adds a great value. This product is Manufactured in United States. This product is designed for pets and there use. Ingredients Water, Thalassiosira Weissflogii, Isochrysis Sp, Nannochloropsis, Protein Hydrolysates With Carotenoids, Citric Acid, Carboxylic Acid, Methyl Paraben, Sodium Propionate. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Directions Dose 1 capful (5 mL) per 50 gallons of water daily for the first 7 days of use. See more

Review: Reef phytoplankton - Great product value for money
Review: As expected, good brand - As expected

## Features

- This product is easy to use
- This product adds a great Value
- This product is Manufactured in United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004YLJ822 |
| Allergen Information | Gluten Free |
| Batteries | 1506 Lithium Metal batteries required. |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 29,937 in Pet Supplies ( See Top 100 in Pet Supplies ) 334 in Aquarium Water Treatments |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,525) |
| Date First Available | 9 Aug. 2012 |
| External Testing Certification | Não aplicável |
| Item Form | Liquid |
| Item Weight | 250 g |
| Item model number | 1506 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Product Dimensions | 4.93 x 4.93 x 16.51 cm; 250 g |
| Quantity | 1 |
| Size | 250 mL |
| Specific Uses | Active |
| Volume | 250 Millilitres |

## Product Details

- **Brand:** Seachem
- **Item form:** Liquid
- **Item weight:** 250 Grams
- **Liquid volume:** 250 Millilitres
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Reef Phytoplankton, 250 mL / 8.5 fl. oz. - Image 1](https://m.media-amazon.com/images/I/71ywIIhCYgL.jpg)

## Available Options

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

## Questions & Answers

**Q: How long does it last without freezing it?**
A: It lasts for couple months but if you keep it in the fridge not the freezer it lasts much longer,I’ve had one open for 3 months kept in fridge no problems

**Q: Is this live Phyto plankton please**
A: If you are thinking of starting your own culture - this is not suitable for this purpose.

**Q: Can this be used to feed copepods to help them establishing a Reef tank**
A: Yes it can

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reef phytoplankton
*by R***E on 5 February 2026*

Great product value for money

### ⭐⭐⭐⭐⭐ As expected, good brand
*by A***L on 11 December 2025*

As expected

### ⭐⭐⭐⭐⭐ Good product
*by K***E on 27 May 2018*

Arrived on time and does as intended

## Frequently Bought Together

- Reef Phytoplankton, 250 mL / 8.5 fl. oz.
- Seachem Reef Zooplankton 250 ml.
- Seachem Reef Plus 500ml

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**Shop now:** [https://www.desertcart.pt/products/48334390-reef-phytoplankton-250-ml-8-5-fl-oz](https://www.desertcart.pt/products/48334390-reef-phytoplankton-250-ml-8-5-fl-oz)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-04-24*