Aragonite C™ Magnesium
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Step 3 — Aragonite Enhancers / Aragonite C™
Reef Essential® · Aragonite Enhancer
The "M" in CAM — ionic and complexed magnesium.
Aragonite C™ provides ionic and complexed magnesium plus sulfate and trace elements. Magnesium keeps alkalinity from swinging and is key to coral and coralline algae health. Use alongside Aragonite A and B for the full major, minor, and trace element profile.
Bleaching on one end, burned tips on the other
If magnesium runs low, you'll see bleaching in coralline algae and small polyp stony corals, and tissue loss on large polyp stony corals. Run it too high and coral tips burn. Low magnesium also makes alkalinity swing more often, adding stress across your whole system — which is why it's treated as a core CAM parameter, not an afterthought.
Aragonite C is designed to keep magnesium steady so your alkalinity dosing stays predictable, rather than chasing swings caused by a magnesium deficit.
What's in the bottle
Contents
Deionized water plus magnesium, sulfate, and trace elements.
Use as a team
Must be used alongside Aragonite A and B to provide the full major, minor, and trace aragonite element profile.
Directions
Shaking isn't required, though inverting 3–4 times helps if it's been sitting a while. Add to high water flow; safe on a dosing pump.
Liquid only
Unlike A and B, Aragonite C is currently only available as a liquid, not a bulk powder.
Reef aquariums only
Formulated for reef tanks, not general saltwater setups without coral.
Want more color?
For coral tissue color and growth beyond CAM, pair with Step 4's Bioactive Color Intensifiers™.
Dosing guide
1 mL/100L (26 gal) raises magnesium by roughly 1 ppm; other elements increase relatively.
| Stocking level | Dose |
|---|---|
| Lightly stocked | 0.50 mL/day per 100L (26 gal) |
| Moderately stocked | 0.75 mL/day per 100L (26 gal) |
| Heavily stocked | 1.00 mL/day per 100L (26 gal) |
| Or as required | to maintain 1230–1310 ppm magnesium |
Questions about this product
Can I use Aragonite C by itself?+
Does this come in a powder format?+
Can I use this on a dosing pump?+
Not sure how much you need?
The dosing app calculates exact amounts for your tank size and magnesium reading.
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