---
product_id: 48334417
title: "Reef Phytoplankton, 500 mL / 16.9 fl. oz."
brand: "seachem"
price: "€ 50.43"
currency: EUR
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.be/products/48334417-reef-phytoplankton-500-ml-16-9-fl-oz
store_origin: BE
region: Belgium
---

# Concentrated marine phytoplankton blend Precise 5 mL dosing cap Proudly made in the USA Reef Phytoplankton, 500 mL / 16.9 fl. oz.

**Brand:** seachem
**Price:** € 50.43
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate your reef game with nature’s powerhouse in a bottle!

## Quick Answers

- **What is this?** Reef Phytoplankton, 500 mL / 16.9 fl. oz. by seachem
- **How much does it cost?** € 50.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/48334417-reef-phytoplankton-500-ml-16-9-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

- • **Value That Lasts:** Generous 500 mL bottle offers long-lasting supply, making it a smart investment for serious reef keepers.
- • **Effortless Dosing:** Easy-to-use 5 mL cap ensures consistent, hassle-free feeding twice weekly for optimal reef growth.
- • **Premium USA Quality:** Manufactured domestically with strict quality controls for trusted purity and performance.
- • **Nutrient-Dense Formula:** Packed with essential fatty acids, proteins, vitamins, and carotenoids to supercharge coral and invertebrate health.
- • **Supports Vibrant Reef Ecosystems:** Boosts coral vitality and coloration by delivering bioavailable nutrients directly to your aquarium inhabitants.

## Overview

Seachem Reef Phytoplankton is a concentrated liquid blend of green and brown marine phytoplankton, formulated to provide essential nutrients like fatty acids, proteins, vitamins, and carotenoids that promote healthy coral and invertebrate growth. Made in the USA, this 500 mL solution features an easy-to-use dosing cap for precise feeding, supporting vibrant and thriving reef ecosystems with proven quality and value.

## Description

Product Description concentrated blend of green and brown marine phytoplankton designed to provide the essential fatty acids, proteins, vitamins, amino acids, with biological carotenoids for invertebrate diet Ingredients Water, Thalassiosira Weissflogii, Isochrysis Sp, Nannochloropsis, Protein Hydrolysates With Carotenoids, Citric Acid, Carboxylic Acid, Methyl Paraben, Sodium Propionate. Directions Shake well before using. Use 5 mL for every 50 gallons of water twice weekly or as required to maintain coral growth. (For Reference purposes, the cap holds 5 mL.) Refrigeration after opening is recommended, but not required.

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 | B004YLJ6OW |
| Allergen Information | Yam Free |
| Best Sellers Rank | 22,401 in Pet Supplies ( See Top 100 in Pet Supplies ) 247 in Aquarium Water Treatments |
| Brand | Seachem |
| Brand Name | Seachem |
| Country Of Origin | USA |
| Customer Reviews | 4.5 out of 5 stars 1,644 Reviews |
| Global Trade Identification Number | 00000116150309 |
| Included Components | Reef Phytoplankton, 500 mL / 16.9 fl. oz. |
| Item Form | Liquid |
| Item Type Name | Aquarium Conditioner |
| Item Weight | 544 g |
| Item form | Liquid |
| Item weight | 544 g |
| Liquid Volume | 500 Millilitres |
| Liquid volume | 500 Millilitres |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer Part Number | 1503 |
| Model Number | 20343 |
| Pet Type | Fish |
| Product Warranty | 2 years |
| Target Species | Fish |
| UPC | 000116150309 |
| Unit Count | 500.0 millilitre |
| Unit count | 500.0 millilitre |

## Product Details

- **Brand:** Seachem
- **Liquid volume:** 500 Millilitres
- **Item weight:** 1.2 Pounds
- **Item form:** Liquid
- **Target species:** Fish

## Images

![Reef Phytoplankton, 500 mL / 16.9 fl. oz. - Image 1](https://m.media-amazon.com/images/I/81nREKOUP4L.jpg)

## 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, 500 mL / 16.9 fl. oz.
- Seachem Reef Zooplankton 500 ml
- Seachem Reef Plus 500ml

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**Shop now:** [https://www.desertcart.be/products/48334417-reef-phytoplankton-500-ml-16-9-fl-oz](https://www.desertcart.be/products/48334417-reef-phytoplankton-500-ml-16-9-fl-oz)

---

*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-21*