--- product_id: 273582324 title: "NO3:PO4-X NITRATE & PHOSPHATE REDUCER - 500ML" brand: "red sea" price: "€ 65.57" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.be/products/273582324-no3-po4-x-nitrate-and-phosphate-reducer-500ml store_origin: BE region: Belgium --- # Algae reduction for crystal-clear reefs Precise nitrate & phosphate control Reef-safe, biologically balanced formula NO3:PO4-X NITRATE & PHOSPHATE REDUCER - 500ML **Brand:** red sea **Price:** € 65.57 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate your reef game—because your corals deserve the spotlight! ## Quick Answers - **What is this?** NO3:PO4-X NITRATE & PHOSPHATE REDUCER - 500ML by red sea - **How much does it cost?** € 65.57 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/273582324-no3-po4-x-nitrate-and-phosphate-reducer-500ml) ## 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 - • **Reef-Safe Formula:** Safe for all marine life with no harmful side effects—protect your ecosystem effortlessly. - • **Algae-Free Aesthetic:** Effectively reduces nuisance algae, keeping your reef pristine and Instagram-ready. - • **Biological Efficiency:** Harnesses natural bacteria with a unique carbon complex for sustainable nutrient reduction. - • **Easy & Cost-Effective:** Simple dosing system that fits seamlessly into your reef maintenance routine without breaking the bank. - • **Controlled Nutrient Balance:** Fine-tune nitrate & phosphate levels to optimize coral vibrancy and growth. ## Overview Red Sea NO3:PO4-X is a 500ml liquid solution designed for precise, reef-safe reduction of nitrate and phosphate in marine aquariums. By biologically enhancing nutrient-reducing bacteria, it controls algae growth and boosts coral coloration and health, making it a trusted choice for reef enthusiasts seeking a balanced, vibrant aquatic environment. ## Description NO3:PO4-X ALGAE MANAGEMENT A complete, reef-safe, controllable solution for nitrate & phosphate reduction NO3:PO4-X is the original, safest, most popular, and best solution that provides a full, reef-safe, controllable method for nitrate and phosphate reduction, thereby boosting coral growth and coloration in any reef or marine fish system. Unlike other methods, the monitored dosing of NO3:PO4-X biologically reduces both nitrate and phosphate, while enabling the fine control of their levels. This fine control allows gradual changes and guarantees accurate maintenance of algae nutrient levels required to safely reduce nuisance algae and bring the symbiotic zooxanthellae algae to the optimal levels needed for boosting coral growth and coloration. NO3:PO4-X is a unique complex of carbon substances and other organically bound elements that enhances the activity of nutrient reducing bacteria, which naturally exist in all marine aquariums. Each carbon source in the complex is utilized by different strains of microorganisms and together with the balanced ratio of enzymatic co-factors guarantee a complete and safe denitrification process (nitrate reduction) and phosphate reduction in the aquarium. To learn more about the scientific aspects click here. * Efficient protein skimming is critical to the safe use of NO3:PO4-X. ## Features - Enables controlled nitrate and phosphate reduction for optimal coral growth and coloration - Reduces nuisance algae - Reef-Safe, with no undesirable side effects - Easy to use, reliable and cost-effective ## Technical Specifications | Specification | Value | |---------------|-------| | Allergen Information | BPA-Free | | Asin | B006L48D3U | | Best Sellers Rank | #10,362 in Pet Supplies (See Top 100 in Pet Supplies) #62 in Aquarium Water Quality Testing & Treatment | | Brand Name | Red Sea | | Country Of Publication | USA | | Customer Reviews | 4.6 4.6 out of 5 stars (557) 4.6 out of 5 stars | | Global Trade Identification Number | 00730773222032 | | Item Form | Liquid | | Item Type Name | Red Sea NO3:PO4-X NITRATE & PHOSPHATE REDUCER - 500ML | | Item Weight | 1 Pounds | | Liquid Volume | 500 Milliliters | | Manufacturer | Red Sea | | Manufacturer Part Number | 306049 | | Model Number | 306049 | | Number Of Items | 1 | | Number Of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | Unit Count | 1 Count | | Upc | 730773222032 | ## Product Details - **Brand:** Red Sea - **Item form:** Liquid - **Item weight:** 1 Pounds - **Liquid volume:** 500 Milliliters - **Unit count:** 1 Count ## Images ![NO3:PO4-X NITRATE & PHOSPHATE REDUCER - 500ML - Image 1](https://m.media-amazon.com/images/I/616rw6PL5yL.jpg) ## Customer Reviews ### ⭐ tres bon produit *by on Reviewed in France 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. ### ⭐⭐⭐⭐⭐ Very good product *by on Reviewed in Canada 17 October 2021* It works. The only one chemical I use in my 90 gal marine set up. Could not live without it ### ⭐⭐⭐⭐⭐ Works great *by on Reviewed in the United States 8 June 2026* I've struggled with high nitrates for years. Seam like I tried everything, biopellets, biobricks, chemical resins, nothing seemed to work. My nitrates were at 100ppm in late April when I started dosing NoPox. Combined with a weekly 4 gal water change (13%) tank volume, and my nitrates are now at 2ppm. Actually lower than what I would like. I've reduced the amount t of NoPox I'm dosing and so far its holding steady. Needless to say I'm very happy with the product ## 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. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/273582324-no3-po4-x-nitrate-and-phosphate-reducer-500ml](https://www.desertcart.be/products/273582324-no3-po4-x-nitrate-and-phosphate-reducer-500ml) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-29*