---
product_id: 428046432
title: "Reef Advantage Magnesium, 1.2 kg / 2.6 lbs"
brand: "seachem"
price: "S$148"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/428046432-reef-advantage-magnesium-1-2-kg-2-6-lbs
store_origin: SG
region: Singapore
---

# 80,000 ppm concentrated blend Treats up to 4,000 gallons per kg Zero ammonia contamination Reef Advantage Magnesium, 1.2 kg / 2.6 lbs

**Brand:** seachem
**Price:** S$148
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your reef’s health with pure, powerful magnesium magic!

## Quick Answers

- **What is this?** Reef Advantage Magnesium, 1.2 kg / 2.6 lbs by seachem
- **How much does it cost?** S$148 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/428046432-reef-advantage-magnesium-1-2-kg-2-6-lbs)

## 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

- • **Massive Coverage:** 1.2 kg treats over 4,000 gallons, perfect for large reef tanks
- • **Ammonia-Free Assurance:** Eliminates common liquid magnesium contaminants for safer aquatic environments
- • **Supports Reef Vitality:** Prevents pH drops and calcium imbalances linked to magnesium depletion
- • **Precision Ionic Balance:** Restores magnesium with minimal disruption to natural seawater chemistry
- • **Ultra-Concentrated Formula:** Delivers powerful magnesium boost at 80,000 ppm for maximum efficiency

## Overview

SeaChem Reef Advantage Magnesium is a highly concentrated, ammonia-free liquid supplement designed to restore depleted magnesium levels in reef aquariums. Its optimized blend of magnesium, chloride, and sulfate salts maintains natural ionic balance while treating up to 4,000 gallons per kilogram, ensuring vibrant coral growth and stable water chemistry.

## Description

Reef Advantage Magnesium, 1.2 kg / 2.6 lbs

## Features

- Raises magnesium and contains no ammonia
- A concentrated optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium
- Minimal impact to the ionic ratios found in natural sea water
- Contains no ammonia, a common contaminant in every liquid magnesium supplement on the market
- 300 grams treats 1200 US gallons

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seachem |
| Liquid Volume | 250 Millilitres |
| Item Weight | 1.11 kg |
| Item Form | Liquid |
| Manufacturer | Seachem Laboratories, Inc. |
| UPC | 000116063708 |
| Global Trade Identification Number | 00000116063708 |
| Country of Origin | USA |
| Item model number | 637 |
| Product Dimensions | 9.53 x 9.53 x 19.69 cm; 1.11 kg |
| ASIN | B001F0MMBO |

## Product Details

- **Brand:** Seachem
- **Liquid Volume:** 250 Millilitres
- **Item Weight:** 1.11 kg
- **Item Form:** Liquid
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Reef Advantage Magnesium, 1.2 kg / 2.6 lbs - Image 1](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)

## Questions & Answers

**Q: is this something I can use for my hydroponics system?  (vs. Epson Salt)**
A: It’s the same basic thing as epsom salt, just without any anti-caking agents in it.

**Q: Is this safe for freshwater planted tanks?  My calcium is much higher then magnesium and would like to increase it.**
A: Honestly, I'm not sure.  I'm a salt water guy, but I do know that you should not add buffers of any kind unless you know that they are needed. If you know what the Magnesium levels are supposed to be, you could probably use this product to correct your Mag levels, but I wouldn't do anything unless I spoke to someone at my local fish store.  Be careful!

**Q: Is it supposed to have bigger chunks in the container?**
A: There’s no anti-caking agents in it so clumps can happen. Just shake the container to break up the clumps.

## Frequently Bought Together

- Seachem Reef Advantage Magnesium, 1.2 kg
- Seachem Reef Advantage Calcium, 500 g

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-23*