---
product_id: 6990968
title: "Reef Phytoplankton, 500 mL / 16.9 fl. oz."
brand: "seachem"
price: "£24.39"
currency: GBP
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.co.uk/products/6990968-reef-phytoplankton-500-ml-16-9-fl-oz
store_origin: GB
region: United Kingdom
---

# Boosts coral growth & vitality 500 mL pure liquid phytoplankton Proudly made in the USA Reef Phytoplankton, 500 mL / 16.9 fl. oz.

**Brand:** seachem
**Price:** £24.39
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate your reef’s vibe with every drop!

## Quick Answers

- **What is this?** Reef Phytoplankton, 500 mL / 16.9 fl. oz. by seachem
- **How much does it cost?** £24.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/6990968-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

- • **Nutrient-Rich Liquid Powerhouse:** 500 mL of concentrated phytoplankton to supercharge your reef ecosystem
- • **Trusted by Reef Enthusiasts Worldwide:** 4.5-star rating from over 500 reviews proves it’s a reef keeper’s must-have
- • **Made in the USA with Quality Assurance:** Crafted domestically for trusted purity and performance
- • **Accelerates Coral & Invertebrate Growth:** Clinically shown to enhance growth rates of corals, zoas, mushrooms, and sea apples
- • **Effortless Integration into Your Routine:** Easy-to-use formula that fits seamlessly into any reef tank maintenance

## Overview

Seachem’s Reef Phytoplankton delivers 500 mL of premium liquid phytoplankton, designed to boost coral and invertebrate growth in reef tanks. Made in the USA, this easy-to-use aquarium treatment is highly rated by hobbyists for enhancing reef vitality and supporting diverse marine life.

## Description

Reef Phytoplankton, 500 mL / 16.9 fl. oz.

Review: Good product - Good product
Review: Excellent phytoplankton, good for reef tank - I was not sure it will work fine , but seems I started using this my corals growing faster I mainly purchased this for my sea apple , I was sweating that can I keep sea apple, but thanks to Seachem for the wonderful product. I am now using this to feed my zoas, mushrooms , goniopora and sea apple and seems its been like by my tank friends Overall I recommend this product and happy with the results

## 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 | #44,093 in Pet Supplies ( See Top 100 in Pet Supplies ) #426 in Aquarium Water Treatments |
| Brand | Seachem |
| Brand Name | Seachem |
| Customer Reviews | 4.6 out of 5 stars 553 Reviews |
| Global Trade Identification Number | 00000116150309 |
| Item Form | Liquid |
| Item Type Name | aquarium-treatments |
| Item Weight | 1.2 Pounds |
| Liquid Volume | 500 Milliliters |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer Part Number | 1503 |
| Model Number | 20343 |
| Target Species | Fish |
| UPC | 000116150309 |
| Unit Count | 500 Milliliters |

## Product Details

- **Brand:** Seachem
- **Item Form:** Liquid
- **Item Weight:** 1.2 Pounds
- **Liquid Volume:** 500 Milliliters
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Reef Phytoplankton, 500 mL / 16.9 fl. oz. - Image 1](https://m.media-amazon.com/images/I/81nREKOUP4L.jpg)
![Reef Phytoplankton, 500 mL / 16.9 fl. oz. - Image 2](https://m.media-amazon.com/images/I/81V2+nu2+vL.jpg)
![Reef Phytoplankton, 500 mL / 16.9 fl. oz. - Image 3](https://m.media-amazon.com/images/I/81ez1Pub7lL.jpg)
![Reef Phytoplankton, 500 mL / 16.9 fl. oz. - Image 4](https://m.media-amazon.com/images/I/81TUs3QkGXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by N***Z on June 14, 2025*

Good product

### ⭐⭐⭐⭐⭐ Excellent phytoplankton, good for reef tank
*by A***E on July 11, 2020*

I was not sure it will work fine , but seems I started using this my corals growing faster I mainly purchased this for my sea apple , I was sweating that can I keep sea apple, but thanks to Seachem for the wonderful product. I am now using this to feed my zoas, mushrooms , goniopora and sea apple and seems its been like by my tank friends Overall I recommend this product and happy with the results

### ⭐⭐⭐⭐ Baby Brine Shrimp food
*by R***R on April 30, 2025*

Great for growing out my brine shrimp.

## Frequently Bought Together

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

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*