--- product_id: 39866964 title: "Magnesion Ionic Magnesium for Reef Aquariums, 2L" brand: "brightwell aquatics" price: "€ 117.24" currency: EUR in_stock: true reviews_count: 9 category: "Brightwell Aquatics" url: https://www.desertcart.hr/products/39866964-magnesion-ionic-magnesium-for-reef-aquariums-2l store_origin: HR region: Croatia --- # 2L high-concentration ionic magnesium Pure formula, zero organics (EDTA/gluconate-free) Precise dosing for 1,290-1,320 ppm Mg balance Magnesion Ionic Magnesium for Reef Aquariums, 2L **Brand:** brightwell aquatics **Price:** € 117.24 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate Your Reef’s Glow with Pure Ionic Power! ## Quick Answers - **What is this?** Magnesion Ionic Magnesium for Reef Aquariums, 2L by brightwell aquatics - **How much does it cost?** € 117.24 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/39866964-magnesion-ionic-magnesium-for-reef-aquariums-2l) ## Best For - brightwell aquatics enthusiasts ## Why This Product - Trusted brightwell aquatics brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pure & Powerful:** No unwanted organics—just clean, potent magnesium to keep your reef ecosystem thriving. - • **Precision Dosing:** Tailor magnesium levels with exact 5ml increments to maintain optimal 1,290-1,320 ppm balance. - • **Magnesium Mastery:** Supercharged ionic magnesium boosts reef-building aragonite formation for vibrant corals and clams. - • **Proudly American-Made:** Crafted in the USA with premium purified ingredients, ensuring consistent quality and reliability. - • **Scientifically Formulated:** Backed by marine microbiologists and empirical data for unmatched aquarium water chemistry control. ## Overview Brightwell Aquatics Magnesion is a 2L high-concentration ionic magnesium liquid designed to optimize reef aquarium health by maintaining ideal magnesium levels (1,290-1,320 ppm). Free from organic contaminants like EDTA and gluconate, it supports coral and clam skeletal growth by regulating calcium and carbonate balance. Developed with scientific precision and made in the USA, this water conditioner delivers pure, potent magnesium dosing tailored for serious reef enthusiasts. ## Description Brightwell Aquatics MAG250 Magnesion Liquid Salt Water Conditioner Elevate your reef aquarium's health with Brightwell Aquatics magnesium solution, a highly concentrated ionic compound formulated by marine scientists for aquarium water treatment. This aquarium water conditioner provides a potent dose of magnesium, regulating the delicate balance between calcium and carbonates in aquarium water. Crucial for reef-building organisms, magnesium is a key component of aragonite, the mineral responsible for skeletal material formation in corals, clams, and allies. Outclassing competitors, our solution is stronger, ensuring unparalleled effectiveness. It contains no unwanted organics like EDTA, gluconate, or polygluconate, offering a pure and focused solution. With a magnesium concentration recommendation of 1,290-1,320 ppm, achieve the perfect balance for immediate positive results in calcium supplementation. Understanding the unique requirements of each aquarium, our solution allows for precise dosing tailored to your setup's magnesium uptake rate. We recommend using a quality salt mix for stable seawater parameters, providing a robust ionic foundation. Trust in Brightwell Aquatics' commitment to purity—our liquid water care supplements are made with purified water and high-purity materials. Formulated based on empirical data, our solutions prioritize observation and measurement over theory, ensuring a precise and effective formula for your aquarium's success. FEATURES AT A GLANCE Super strong solution to maintain a balance between calcium and carbonates No unwanted organic material Provides a potent dose of magnesium Developed based on empirical data, prioritizing observation and measurement Formulated utilizing extensive data compiled by microbiologists AMERICAN-MADE EXCELLENCE Trust in the quality and excellence of Brightwell Aquatics, an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently strive to deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium.Brightwell Aquatics MAG250 Magnesion Liquid Salt Water Conditioner Elevate your reef aquarium's health with Brightwell Aquatics magnesium solution, a highly concentrated ionic compound formulated by marine scientists for aquarium water treatment. This aquarium water conditioner provides a potent dose of magnesium, regulating the delicate balance between calcium and carbonates in aquarium water. Crucial for reef-building organisms, magnesium is a key component of aragonite, the mineral responsible for skeletal material formation in corals, clams, and allies. Outclassing competitors, our solution is stronger, ensuring unparalleled effectiveness. It contains no unwanted organics like EDTA, gluconate, or polygluconate, offering a pure and focused solution. With a magnesium concentration recommendation of 1,290-1,320 ppm, achieve the perfect balance for immediate positive results in calcium supplementation. Understanding the unique requirements of each aquarium, our solution allows for precise dosing tailored to your setup's magnesium uptake rate. We recommend using a quality salt mix for stable seawater parameters, providing a robust ionic foundation. Trust in Brightwell Aquatics' commitment to purity—our liquid water care supplements are made with purified water and high-purity materials. Formulated based on empirical data, our solutions prioritize observation and measurement over theory, ensuring a precise and effective formula for your aquarium's success. FEATURES AT A GLANCE Super strong solution to maintain a balance between calcium and carbonates No unwanted organic material Provides a potent dose of magnesium Developed based on empirical data, prioritizing observation and measurement Formulated utilizing extensive data compiled by microbiologists AMERICAN-MADE EXCELLENCE Trust in the quality and excellence of Brightwell Aquatics, an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently strive to deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium. Review: Received on time, quality consistent. Very good product. - It works great Review: Increase magnisium - Works great for increasing magnesium in fish tank ## Features - HIGH-CONCENTRATION IONIC MAGNESIUM SOLUTION - Magnesion Liquid Reef Salt Water Conditioner is a high-concentrate solution for maintaining the optimal balance in aquarium reef tanks. Magnesium salt regulates aquarium calcium and carbonate concentrations to prevent excessive inorganic precipitation - REEF-BUILDING ESSENTIAL - Our aquarium water conditioner is a highly-concentrated ionic magnesium solution that plays a vital role in the formation of aragonite, the skeletal material of reef-building organisms like coral and clams - FREE FROM ORGANIC MATERIAL - This aquarium water conditioner contains no unwanted organic material such as EDTA, gluconate, or polygluconate, providing a pure formula for your aquarium's well-being. A powerful solution, it effectively boosts the health and vitality of aquatic ecosystems - DIRECTIONS – Before use, shake the supplement well. Administer 5 ml (1 capful) every other day, or as necessary, to sustain magnesium levels between 1,290 - 1,320 ppm in 20 gallons of aquarium water. When employed this way, 250 ml treats up to 1,000 gallons (3,785 L) - AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003WRI6PE | | Allergen Information | Sulphites Free | | Best Sellers Rank | #15,477 in Pet Supplies ( See Top 100 in Pet Supplies ) #114 in Aquarium Water Treatments | | Brand | Brightwell Aquatics | | Brand Name | Brightwell Aquatics | | Customer Reviews | 4.7 out of 5 stars 443 Reviews | | Global Trade Identification Number | 00810086010394 | | Included Components | Magnesion | | Item Form | Liquid | | Item Type Name | Water Conditioner | | Item Weight | 1 Pounds | | Liquid Volume | 67 Fluid Ounces | | Manufacturer | TopDawg Pet Supply | | Manufacturer Part Number | MAG2L | | Model Number | MAG2L | | Target Species | Fish | | UPC | 810086010394 | | Unit Count | 1 Count | ## Product Details - **Brand:** Brightwell Aquatics - **Item Form:** Liquid - **Item Weight:** 16 ounces - **Liquid Volume:** 67 Fluid Ounces - **Manufacturer:** TopDawg Pet Supply ## Images ![Magnesion Ionic Magnesium for Reef Aquariums, 2L - Image 1](https://m.media-amazon.com/images/I/71L9NU170+L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Received on time, quality consistent. Very good product. *by J***E on May 24, 2026* It works great ### ⭐⭐⭐⭐⭐ Increase magnisium *by C***S on June 7, 2026* Works great for increasing magnesium in fish tank ### ⭐⭐⭐⭐⭐ Great product. *by N***N on December 3, 2025* This works very well. My tank loves it. The coral is very happy and it didn’t have any side effects. Very easy to use and doesn’t cloud the water like others do. Great value. --- ## 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.hr/products/39866964-magnesion-ionic-magnesium-for-reef-aquariums-2l](https://www.desertcart.hr/products/39866964-magnesion-ionic-magnesium-for-reef-aquariums-2l) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-14*