Magnesion – FAQ

What is Magnesion?
Magnesion is a highly concentrated liquid magnesium supplement designed to increase and maintain magnesium levels in marine and reef aquariums.

What does Magnesion do?
It raises magnesium levels and helps regulate the balance between calcium and alkalinity, supporting overall reef stability.

Why is magnesium important in a reef aquarium?
Magnesium helps prevent calcium and carbonate from binding together and precipitating out of the water. This allows both calcium and alkalinity to remain stable and available for coral growth.

What magnesium level should I maintain?

• Target range: ~1,290–1,320 ppm
• Stability is more important than exact numbers

What makes Magnesion different from other magnesium supplements?

• Ionic formulation for immediate availability
• Highly concentrated
• Free of unwanted organics (no EDTA or gluconates)
• Designed to maintain proper calcium/alkalinity balance

Is Magnesion safe for fish, corals, and invertebrates?
Yes. When used as directed, it is safe for all marine aquarium inhabitants.

When should I use Magnesion?

• When magnesium levels fall below target range
• When calcium and alkalinity are difficult to stabilize
• In reef aquariums with moderate to high demand

How do I dose Magnesion?

• Shake well before use
• Typical starting dose: ~5 ml per 20 gallons every other day
• Adjust dosing based on magnesium test results

How much will Magnesion raise magnesium levels?
Approximately 1 ml increases magnesium by ~26 ppm per gallon (estimate; always test and adjust).

How often should I dose Magnesion?

• Daily dosing is preferred for stability
• Adjust frequency based on your tank’s magnesium consumption

Should I test magnesium before dosing?
Yes. Always test magnesium levels before adjusting dosing to avoid overcorrection.

Can I overdose Magnesion?
Yes. Excess magnesium can lead to imbalance and may negatively impact water chemistry. Dose carefully and test regularly.

Can I use Magnesion with Reef Code or Calcion?
Yes. Magnesium works alongside calcium and alkalinity:

• Magnesion → Magnesium
• Calcion → Calcium
• Reef Code B → Alkalinity

Maintaining all three in balance is essential for reef stability.

What problems does Magnesion help solve?

• Difficulty maintaining calcium levels
• Alkalinity instability
• Precipitation issues (white buildup on equipment)
• Slow coral growth due to imbalance