Seachem Reef Status Magnesium

Seachem Reef Status Magnesium is a titration test kit that directly measures magnesium and, uniquely, resolves your alkalinity into its carbonate and borate parts. With 75 titration tests each, it gives serious reef keepers a precise read on the third pillar of reef chemistry. Magnesium is what keeps calcium and alkalinity stable in the same water, so it belongs right alongside your calcium and alkalinity testing. It fits with the rest of our water testing gear and saltwater supplies.

Why Magnesium Matters

Magnesium is the quiet partner behind calcium and alkalinity. Without enough of it, you simply cannot hold both calcium and alkalinity at their targets, and dosing either one starts to feel like a losing battle. Most reef keepers hold magnesium between about 1250 and 1350 mg/L. Getting it right first makes everything else in the tank easier to balance.

How the Test Works

• Direct titration. Add reagents and count drops to a clear endpoint. No matching against a printed chart.
• Resolves carbonate and borate. Beyond magnesium, it separates the carbonate and borate portions of your alkalinity, a level of detail most kits do not offer.
• Interference free with reference validation. A known standard lets you confirm the kit is reading true, so you can trust the numbers.
• 75 tests each. Plenty of testing across all three measurements.
• Requires DI water. You supply clean deionized water for the procedure. It is not included.

Specifications

Recommended Pairings

• Seachem Reef Advantage Magnesium, raise magnesium back to target when your test reads low.
• Seachem Reef Status Calcium, the matching titration kit for the calcium side of the big three.
• Seachem Reef Builder, raise carbonate alkalinity without swinging pH.

FAQ

What magnesium level should I run?
Most reef tanks do well between about 1250 and 1350 mg/L. Keep it stable and roughly in proportion with your calcium and alkalinity.

Why does magnesium matter so much?
Magnesium keeps calcium and carbonate from binding up and dropping out of the water. If magnesium is low, holding calcium and alkalinity at target becomes nearly impossible.

What is the point of separating carbonate and borate?
Standard alkalinity tests lump them together. Seeing carbonate on its own gives advanced reefers a clearer picture of what their corals actually have to work with.

Why do I need DI water?
The titration uses clean deionized water so nothing skews the result. DI water is not included, so have some ready before testing.