---
product_id: 51645605
title: "Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb"
brand: "red sea"
price: "€ 46.32"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.hr/products/51645605-red-sea-reef-care-no3-po4-x-nitrate-and-phosphate
store_origin: HR
region: Croatia
---

# biological nitrate & phosphate reduction optimal coral growth & coloration 500 ml precision dosing Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb

**Brand:** red sea
**Price:** € 46.32
**Availability:** ❌ Out of Stock

## Summary

> 🌊 Elevate Your Reef Game — Because Your Corals Deserve the Spotlight

## Quick Answers

- **What is this?** Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb by red sea
- **How much does it cost?** € 46.32 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/51645605-red-sea-reef-care-no3-po4-x-nitrate-and-phosphate)

## Best For

- red sea enthusiasts

## Why This Product

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

## Key Features

- • **Biological Powerhouse:** Harnesses bacteria-driven reduction to naturally eliminate nuisance algae and cyanobacteria.
- • **Coral Color Amplifier:** Optimizes zooanthellae health, unlocking vibrant, natural coral coloration.
- • **Test & Monitor Friendly:** Designed for use with professional nitrate and phosphate test kits to ensure flawless aquarium conditions.
- • **Essential Reef Care Step:** A must-have pre-treatment for the Reef Colors supplement family to maximize coral vitality.
- • **Precision Dosing for Perfect Balance:** Accurately control nitrate and phosphate levels with easy-to-use 500 ml liquid formula.

## Overview

Red Sea Reef Care NO3:PO4-X is a 500 ml liquid biological nitrate and phosphate remover that prevents nuisance algae and balances coral symbiotic algae for optimal growth and vibrant coloration. It works by promoting bacterial reduction processes and is essential for use with the Reef Colors supplement family. Accurate dosing with test kits is required, and it should not be combined with other phosphate removers.

## Description

Product description Red Sea biological nitrate and phosphate remover prevents nuisance algae and enables control of zooanthealle for optimum coral growth and coloration. NO3:PO4-X promotes the biological reduction processes of nitrate and phosphate by bacteria to reduce nuisance algae and cyanobacteria and effectively balance the zooanthealle population of corals. NO3:PO4 -X is part of the reef care program and is an essential pre-requirement for using the reef colors supplement family that enables corals to display their natural colors. NO3:PO4-X must be accurately dosed by using nitrate and phosphate pro test kits and cannot be used with other phosphate removers. Available in 500-ml bottle. Directions 1. Test your aquarium water for nitrate and phosphate levels. 2. Accurately dose NO3:PO4-X based on the test results. 3. Do not use NO3:PO4-X with other phosphate removers. 4. Monitor nitrate and phosphate levels regularly to ensure proper reduction.

Review: Red Sea Reef No/Pox - Excellent product, shipped well packed and arrived as advertised.
Review: livraison trop longue presque 3 semaines pas encore reçu, terminé je l achète chez concurrent. Sinon produit au top pas de po4 et no3 , 1ml tout les jours de l année , le meilleur produit que j ai utilisé, essayé d autres marques moins efficace ,super pour mon aquarium récifal de 125 litres.

## Features

- Flammable liquid and vapour.
- Biological nitrate and phosphate remover prevents nuisance algae and enables control of zooanthealle for optimum coral growth and coloration
- Promotes the biological reduction processes of nitrate and phosphate by bacteria to reduce nuisance algae
- It is part of the reef care program and is an essential pre-requirement for using the reef colors supplement family that enables corals
- NO3:PO4-X must be accurately dosed by using nitrate and phosphate pro test kits and cannot be used with other phosphate removers
- Available in 500-ml bottle

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006L48D3U |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 114,613 in Pet Supplies ( See Top 100 in Pet Supplies ) 1,085 in Aquarium Water Treatments |
| Customer Reviews | 4.5 4.5 out of 5 stars (541) |
| Date First Available | 7 Aug. 2012 |
| Item Form | Liquid |
| Item Weight | 454 g |
| Item model number | 306049 |
| Number of Items | 1 |
| Product Dimensions | 8 x 20 x 8 cm; 453.59 g |
| Quantity | 1 |

## Product Details

- **Brand:** Red Sea
- **Item form:** Liquid
- **Item weight:** 1 Pounds
- **Liquid volume:** 500 Millilitres
- **Manufacturer:** TopDawg Pet Supply

## Images

![Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb - Image 1](https://m.media-amazon.com/images/I/616rw6PL5yL.jpg)
![Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb - Image 2](https://m.media-amazon.com/images/I/71N3PqCA8mL.jpg)
![Red Sea Reef Care NO3:PO4-X Nitrate and Phosphate Reducer - 16.9 oz. (500-ml) for Aquarium Coral Care, Algae Control, Optimal Coral Growth and Coloration - 1 lb - Image 3](https://m.media-amazon.com/images/I/81SY16fGxyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Red Sea Reef No/Pox
*by G***. on 6 March 2025*

Excellent product, shipped well packed and arrived as advertised.

### ⭐ Review
*by J***J on 20 October 2024*

livraison trop longue presque 3 semaines pas encore reçu, terminé je l achète chez concurrent. Sinon produit au top pas de po4 et no3 , 1ml tout les jours de l année , le meilleur produit que j ai utilisé, essayé d autres marques moins efficace ,super pour mon aquarium récifal de 125 litres.

### ⭐⭐⭐⭐⭐ Review
*by Y***R on 17 October 2021*

It works. The only one chemical I use in my 90 gal marine set up. Could not live without it

## Frequently Bought Together

- Red Sea NO3:PO4-X 500ml NOPOX - Nitrate & Phosphate Reducer for Reef Aquariums, Promotes Healthy Coral Growth, Controls Algae & Maintains Water
- Red Sea Reef Energy Plus 500ml (AB+) All in One Coral Food for Saltwater Aquarium Marine Reef Tanks | Food for Soft, LPS, SPS, and Non-Photosynthetic Corals
- Tropic Marin All-for-Reef Liquid 500 ml.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-21*