---
product_id: 4382472
title: "Magnesium (MG) Test Kit"
brand: "salifert"
price: "R777"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Salifert"
url: https://www.desertcart.co.za/products/4382472-magnesium-mg-test-kit
store_origin: ZA
region: South Africa
---

# Marine water specific Accurate color-step measurement Up to 50 precise tests Magnesium (MG) Test Kit

**Brand:** salifert
**Price:** R777
**Availability:** ✅ In Stock

## Summary

> 🌟 Keep your reef thriving with precision you can trust!

## Quick Answers

- **What is this?** Magnesium (MG) Test Kit by salifert
- **How much does it cost?** R777 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/4382472-magnesium-mg-test-kit)

## Best For

- salifert enthusiasts

## Why This Product

- Trusted salifert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Marine-Only Mastery:** Optimized exclusively for saltwater tanks, ensuring no interference from calcium or strontium.
- • **Coral Growth Catalyst:** Supports vibrant coral and algae health by maintaining perfect magnesium-calcium-alkalinity harmony.
- • **Precision at Every Drop:** Measures magnesium in clear 30 mg/L increments for confident tank balance.
- • **Long-Lasting Testing Power:** Perform up to 50 tests per kit—stay ahead of your aquarium’s needs without frequent repurchasing.
- • **Simplified Testing Process:** Streamlined steps make it easy and fast to maintain ideal magnesium levels—no guesswork involved.

## Overview

The Salifert Magnesium (MG) Test Kit delivers highly accurate, interference-free magnesium measurements in marine aquariums with easy-to-read color steps. Designed for up to 50 tests, it ensures optimal coral and algae growth by maintaining essential magnesium levels that balance calcium and alkalinity. Trusted by hobbyists for precision and simplicity, this kit is a must-have for professional-grade saltwater tank care.

## Description

Salifert Magnesium Profit-Test Magnesium is present in natural sea water in a fairly high concentration (1350 - 1500 mg/L) and is an essential element of chlorophyll which is necessary for photosynthesis. Without photosynthesis plants, algae and coral would not be able to survive. Magnesium also helps to maintain the correct combination of calcium concentration and alkalinity as it slows down the formation of calcium carbonate which can absorb many important trace elements within the aquarium. Maintaining a correct magnesium concentration is therefore very important and is indirectly responsible for fast coral and calcareous algae growth by making it possible to maintain correct calcium and alkalinity figures. Magnesium is depleted by algae growth and also by the use of excessive kalkwasser or by going far beyond natural calcium, alkalinity and pH values. The Salifert Magnesium Profit-Test is easy to use and accurate with measurements in steps of 30 mg/L. Results are not affected by strontium and calcium interference. Can be used for marine water only. Calcium and strontium will not interfere when their total concentration is between 200 and 650 ppm. This is mostly the case. Up to 50 tests.Warning!Keep out of reach of children. Not for consumption.

Review: Best magnesium test kit available - I run several marine aquariums. I manually test 6 parameters on each tank twice a week, have tried every single brand of test kits over the last 5 years or so, have owned automated testing systems (and found them completely inadequate and generally inaccurate), and routinely send in samples for ICPOES testing to confirm my manual results. This is clearly the most accurate hobbyist test currently available for magnesium. The test is easy to perform with a clear endpoint to the titration. Salifert recently shortened the test process by one step, making it even simpler to perform, without loss of accuracy. Some may be tempted to switch to the new Hanna magnesium checker. Don't do it. Overall, Hanna makes great hobbyist checkers, and they are my first choice for several parameters. Unfortunately, not so for the Hanna magnesium checker, which consistently gives reading of about 100 ppm lower than the actual value. I was frankly stunned how badly they flubbed this one, considering how good their gear is overall.
Review: Good quality - I often need to use the thing, my saltwater aquarium every week to test the water quality, easy to use, easy to operate.

## Features

- The magnesium test kit effectively tests and provides a balanced magnesium aquarium
- The magnesium test kit can perform up to 50 tests
- The test will measure accurate steps of color change in tank
- The Package Weight Of The Product Is 0.5 Pounds

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001EIYBKM |
| ASIN  | B001EIYBKM |
| Age Range Description | Adult |
| Best Sellers Rank | #17,048 in Pet Supplies ( See Top 100 in Pet Supplies ) #23 in Aquarium Test Kits |
| Brand Name | Salifert |
| Color | Clear |
| Country of Origin | Netherlands |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,016) |
| Date First Available | August 18, 2004 |
| Date First Available  | August 18, 2004 |
| Department | men, women |
| Department  | men, women |
| Directions | See Directions Before Use. |
| Included Components | Salifert Magnesium (MG) Test Kit |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 5 x 5 x 4 inches |
| Item Package Dimensions L x W x H | 4.96 x 4.21 x 1.81 inches |
| Item Weight | 0.12 Kilograms |
| Item model number | 8714079130422 |
| Item model number  | 8714079130422 |
| Manufacturer | Deepwater Aquatics Distribution |
| Manufacturer  | Deepwater Aquatics Distribution |
| Material | 100% All Seas Marine |
| Model Name | SI017 |
| Number of Items | 1 |
| Product Dimensions  | 5 x 5 x 4 inches; 4.16 ounces |
| Size | 1 Count (Pack of 1) |
| Specific Uses for Product | Active |
| Target Audience Keyword | 1, fish |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Salifert
- **Model Name:** SI017
- **Number of Pieces:** 1
- **Special Feature:** Easy to Use
- **Specific Uses For Product:** Active

## Images

![Magnesium (MG) Test Kit - Image 1](https://m.media-amazon.com/images/I/71WbtRpJgIL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best magnesium test kit available
*by R***N on December 17, 2022*

I run several marine aquariums. I manually test 6 parameters on each tank twice a week, have tried every single brand of test kits over the last 5 years or so, have owned automated testing systems (and found them completely inadequate and generally inaccurate), and routinely send in samples for ICPOES testing to confirm my manual results. This is clearly the most accurate hobbyist test currently available for magnesium. The test is easy to perform with a clear endpoint to the titration. Salifert recently shortened the test process by one step, making it even simpler to perform, without loss of accuracy. Some may be tempted to switch to the new Hanna magnesium checker. Don't do it. Overall, Hanna makes great hobbyist checkers, and they are my first choice for several parameters. Unfortunately, not so for the Hanna magnesium checker, which consistently gives reading of about 100 ppm lower than the actual value. I was frankly stunned how badly they flubbed this one, considering how good their gear is overall.

### ⭐⭐⭐⭐⭐ Good quality
*by J***L on March 1, 2025*

I often need to use the thing, my saltwater aquarium every week to test the water quality, easy to use, easy to operate.

### ⭐⭐⭐⭐⭐ Easy to use
*by J***6 on January 6, 2025*

Great product, easy to use and accurate

## Frequently Bought Together

- Salifert Magnesium (MG) Test Kit
- Salifert Calcium (Ca) Test Kit - 50 to 100 Tests
- Salifert Carbonate Hardness & Alkalinity (Kh/Alk) Test Kit, 100-200 Tests

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-08*