Reef Essential® Signature Series™ / Strontium
Signature Series™ · Single-Element Precision
Strontium — for when your ICP test says you're low.
Ultra-pure, ICP-OES tested strontium on its own — for correcting a specific deficiency your water test just flagged, not for routine blanket dosing.
Why strontium, specifically
What this element is actually doing in your tank, in plain terms.
Aragonite over calcite
Strontium is present in coral skeleton and improves calcification, helping corals build strong aragonite rather than brittle calcite — directly tied to skeletal density.
Coralline algae uptake
Strontium is also absorbed by calcareous algae such as coralline, which in turn helps naturally reduce unwanted nutrients while providing oxygen, expelling carbon dioxide, and improving pH stability.
Fast-growing SPS & coralline
Rapidly calcifying SPS corals and any system with heavy coralline algae coverage draw down strontium faster than a slow-growing LPS or FOWLR tank.
When to reach for Strontium specifically
Single-element dosing is precision correction, not a routine — here's how to tell if this is the bottle you need.
Your ICP test flags low strontium specifically
Signature Series products exist to correct one number at a time — dose based on your actual test result, not a guess.
A blended maintenance product instead
Step 3 — Aragonite Enhancers™ (Aragonite A/B/C) already carries strontium as part of the full calcium/alkalinity/magnesium system — better for routine maintenance than single-element dosing.
Dosing
Dose according to your ICP test result, not on a fixed schedule.
| What you're doing | Effect |
|---|---|
| Per 100L (26 US gal) dosed | 1 mL raises Strontium by 0.5 ppm |
| Recommended pacing | Spread the correction over at least 1 week |
| Target concentration | 0.03 – 0.09 ppm |
Rest of the Signature Series™
Organized by periodic table group — dose only the elements your ICP test says you're missing.
Questions about this product
Do I need to test before dosing this?+
How is this different from the strontium in Aragonite B™?+
Can I use this after any ICP test, or only Quantum's?+
What's actually in the bottle?+
Got an ICP result to correct?
The dosing app turns your test numbers into an exact daily dose.
Order direct from Quantum