Fauna Marin Balling Salt Magnesium Mix
SKU: FM-BMG
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- Fauna Marin Balling Salt Magnesium Mix is a pure magnesium salt that adds magnesium to reef tank water.
- It is made for reef tanks that use the Balling Light method to dose magnesium, along with calcium and carbonate.
- It helps you hold magnesium in the 1200 to 1350 mg/L range that Fauna Marin recommends for reef tanks.
- Its high-purity salt has the lowest water content and adds pH buffers that help keep parameters stable.
Fauna Marin
Fauna Marin is a German manufacturer offering an extensive, successful product line that includes coral and fish foods, water treatments, lab tests, and equipment.
Balling Light Magnesium Salt for Reef Tank Magnesium Dosing
Fauna Marin Balling Salt Magnesium Mix is a dry magnesium salt made for the Balling Light method of reef dosing. Reef tanks use up magnesium over time, and this mix puts it back.
Fauna Marin makes its Balling Light salts to be high purity with the lowest water content. They also contain bioactive stabilizers, pH buffers, and unique minerals that help keep water chemistry steady. The added trace elements stay stable in solution, so corals can use them more easily. The mix supports coral growth and color without darkening the corals.
Key Features:
- High-purity salt with the lowest water content for more effective dosing
- Bioactive stabilizers, pH buffers, and unique minerals that improve the stability of key parameters
- Trace elements that stay stable in solution and stay available to corals
- Matched to modern sea salts
- Helps hold a stable pH
- Bioactive substances that support color development and coral growth
- Works with Fauna Marin Calcium and Carbonate mixes in the Balling Light system
- Sold in 1KG, 2KG, and 4KG sizes
Ideal For:
- Reef aquariums that already run, or plan to run, the Balling Light method
- Reef keepers who want to dose magnesium by measured tank consumption
- Hobbyists building a full Fauna Marin Balling Light routine with the calcium, carbonate, and trace element products
Pro Tips:
- Calculate your dose. Do not guess. Every tank uses magnesium at a different rate. Fauna Marin does not give one fixed dose. Use the AquaCalculator to work out the amount for your tank, then dose exactly that amount.
- Test magnesium before you change anything. Fauna Marin recommends 1200 to 1350 mg/L. Test first, dose by your calculated amount, then test again to confirm your tank is holding steady.
- Dose in order. Fauna Marin's Balling Light directions say to add magnesium first, then calcium, then carbonate, with about 10 minutes between each. This keeps the salts from reacting with each other at full strength in the water.
What's Included:
- Fauna Marin Balling Salt Magnesium Mix in your chosen size (1KG, 2KG, or 4KG)
Specifications:
- Brand: Fauna Marin
- Product: Balling Salt Magnesium Mix
- Purpose: Adds magnesium to saltwater using the Balling Light system
- Sizes and SKUs: 1KG (FM-BMG-10), 2KG (FM-BMG-15), 4KG (FM-BMG-40)
- Recommended magnesium level: 1200 to 1350 mg/L
- Dosing: Calculate with the AquaCalculator for your tank
- System: Balling Light
- Storage: Keep dry and tightly closed
- Use: Not for human consumption. Keep away from children.
While most of our equipment carries a one-year manufacturer's warranty, consumable products like fish and coral foods are not covered under traditional warranty terms due to their perishable nature and varied storage conditions. However, we fully stand behind the quality of every product we sell. If you experience any issues with your food purchase shortly after receiving it, such as concerns about freshness, packaging integrity, or product quality, please contact us at [email protected]. We're committed to making it right and will work with you to resolve any problems quickly and fairly.
Instructions*:
- Test your current magnesium level. Fauna Marin recommends 1200 to 1350 mg/L.
- Use the AquaCalculator to work out the right amount for your aquarium. Exact dose amounts cannot be given because every tank is different.
- Dose the calculated amount exactly.
- If you also dose calcium and carbonate, add magnesium first, then calcium, then carbonate. Wait about 10 minutes between each.
- Retest magnesium and adjust your calculated dose as needed.
Safety: Causes serious eye irritation. If in eyes, rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Keep away from children. Not for human consumption.
*Always read the label and product instructions on the bottle before use. Dosing guidelines, safety information, and application instructions are subject to change. The information on this page reflects product details available at the time of publication and may not represent the most current formulation or recommendations.

