---
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: "¥14078"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/60035165-reef-foundation-c-magnesium-mg-supplement-1000ml-maintains-magnesium-balance
store_origin: JP
region: Japan
---

# Supports balanced coral skeleton formation Blended magnesium salts for optimal coral growth 1 ml raises Mg by 1 ppm/100L Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums

**Brand:** red sea
**Price:** ¥14078
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your reef’s glow with precision magnesium magic!

## 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?** ¥14078 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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

- • **Tested & Trusted:** Pair with Red Sea Magnesium Pro Test Kit for precise dosing and reef success
- • **Seamless Integration:** Works in harmony with Reef Foundation A & B for a complete reef care regimen
- • **Optimized Coral Health:** Maintains essential magnesium balance to prevent coral stress and promote growth
- • **Precision Magnesium Boost:** Easily raise Mg levels by 1 ppm per 1 ml per 100L for perfect reef chemistry
- • **Scientifically Blended Formula:** Advanced magnesium salt complex designed for vibrant, healthy coral skeletons

## Overview

Reef Foundation C is a 1000ml magnesium supplement formulated with blended salts to maintain optimal magnesium levels in marine and reef aquariums. Each 1 ml dose raises magnesium by 1 ppm per 100 liters, supporting balanced coral skeleton formation. Designed to be used alongside Reef Foundation A and B, it ensures comprehensive reef care and healthier, more vibrant corals.

## Description

Reef Foundation C Magnesium (Mg) Supplement, 1000ml - Maintains Magnesium Balance for Healthy Corals in Marine & Reef Aquariums

## 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

## Product Details

- **Brand:** Red Sea
- **Liquid Volume:** 1000 Milliliters
- **Item Weight:** 3.25 Pounds
- **Item Form:** Liquid, Powder
- **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

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-01-25*