---
product_id: 60035165
title: "Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums"
brand: "red sea"
price: "₩124528"
currency: KRW
in_stock: true
reviews_count: 9
category: "Red Sea"
url: https://www.desertcart.kr/products/60035165-reef-foundation-c-magnesium-mg-supplement-1000ml-maintains-magnesium-balance
store_origin: KR
region: South Korea
---

# 1000 ml liquid formula for sustained reef health Blended magnesium salts for optimal coral skeleton growth 1 ppm Mg raise per 1 ml dosing Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums

**Brand:** red sea
**Price:** ₩124528
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Reef’s Glow with Every Drop!

## Quick Answers

- **What is this?** Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums by red sea
- **How much does it cost?** ₩124528 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/60035165-reef-foundation-c-magnesium-mg-supplement-1000ml-maintains-magnesium-balance)

## 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

- • **User-Friendly Dosing:** Simple liquid dosing tailored to measured magnesium uptake—no guesswork
- • **Precision Magnesium Control:** Easily raise Mg levels by 1 ppm per ml for perfect coral balance
- • **Proven Coral Color Enhancement:** Trusted by reef enthusiasts to make coral colors truly pop
- • **Scientifically Blended Formula:** Advanced magnesium complex designed for vibrant, healthy coral skeletons
- • **Seamless Reef Care Integration:** Works synergistically with Reef Foundation A & B for complete reef vitality

## Overview

Red Sea Reef Foundation C Magnesium Supplement is a 1000 ml liquid formula designed to precisely maintain magnesium levels in marine and reef aquariums. Each milliliter raises magnesium by 1 ppm in 100 liters of water, supporting balanced coral skeleton formation and vibrant coral coloration. Part of Red Sea’s comprehensive Reef Care program, it works best when combined with Reef Foundation A and B supplements and is ideal for all life stages of reef inhabitants.

## Description

Buy Red Sea Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums: Magnesium - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Makes coral colors pop!! - I love this product. I dose five dropper fulls every other day in my mix coral reef tank (200L sustem), and all things remaining equal, the colors of my corals pop up beautifully. Some important learnings from AI research: turn of your skimmer for a good 6hrs after dosing and the product is best dosed during twilight.
Review: Red Sea for me - Strong and affective I use this the keep my tank functioning properly

## Features

- Reef Foundation C is a magnesium complex for balanced formation of coral skeletons. It contains blended salts of Magnesium and is part of Red Sea's complete Reef Care program. For best results dose according to a measured uptake of magnesium and in conjunction with Reef Foundation A and Reef Foundation B.
- Liquid. 1 liter.
- Concentration: 1 ml will raise the Mg level of 100 liters (25gal) by 1 ppm
- For proper use of this product you may want to use the Red Sea Magnesium Pro Aquarium Test Kit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0798TPJ2Z |
| ASIN  | B0798TPJ2Z |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #29,726 in Pet Supplies ( See Top 100 in Pet Supplies ) #279 in Aquarium Water Treatments |
| Brand Name | Red Sea |
| Customer Reviews | 4.8 4.8 out of 5 stars (250) |
| Date First Available | January 24, 2018 |
| Date First Available  | January 24, 2018 |
| Department | All Ages |
| Department  | All Ages |
| Directions | use as directed |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 35 x 100 x 35 inches |
| Item Package Dimensions L x W x H | 10.24 x 3.62 x 3.5 inches |
| Item Weight | 3.3 Pounds |
| Item model number | 730773220342 |
| Item model number  | 730773220342 |
| Manufacturer | Red Sea |
| Manufacturer  | Red Sea |
| Model Name | Red Sea Reef Foundation C, Magnesium Supplement, |
| Number of Items | 1 |
| Product Dimensions  | 35 x 100 x 35 inches; 3.25 Pounds |
| Size | 1 Liter |
| Specific Uses for Product | aquarium treatments |
| Style | Classic |
| Target Audience Keyword | Fish |

## Product Details

- **Brand:** Red Sea
- **Item Form:** Liquid, Powder
- **Item Weight:** 3.3 Pounds
- **Liquid Volume:** 1000 Milliliters
- **Manufacturer:** Red Sea

## Images

![Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums - Image 1](https://m.media-amazon.com/images/I/71XcawfQiaL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Anyone using this with good success? how often are you adding magnesium? i have a 150 gallon reef tank mostly lps**
A: I have had great success with this product. I dose 8ml a day in my 250g tank. I use this product because it is magnesium chloride.  Other products are magnesium sulfate or sulfite and I already have too many issues with excess sulfur.  For me, it’s been a great product

## Customer Reviews

### ⭐⭐⭐⭐⭐ Makes coral colors pop!!
*by E***E on July 21, 2025*

I love this product. I dose five dropper fulls every other day in my mix coral reef tank (200L sustem), and all things remaining equal, the colors of my corals pop up beautifully. Some important learnings from AI research: turn of your skimmer for a good 6hrs after dosing and the product is best dosed during twilight.

### ⭐⭐⭐⭐⭐ Red Sea for me
*by D***S on February 20, 2025*

Strong and affective I use this the keep my tank functioning properly

### ⭐⭐⭐⭐⭐ Simple
*by R***H on January 16, 2025*

I found this very easy to increase Mag in my aquarium.

## Frequently Bought Together

- Red Sea Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums
- Red Sea Reef Foundation B Alkalinity (KH) Supplement, 1000ml - Boosts Carbonate Levels for Strong Coral Skeletons in Reef & Marine Aquariums
- Red Sea Reef Energy Plus 1000ml (AB+) All in One Coral Food for Saltwater Aquarium Marine Reef Tanks | Food for Soft, LPS, SPS, and Non-Photosynthetic Corals

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-01*