- Sku: swcor250
- Vendor: Quantum USA
Quantum Sweet Coralline
Quantum Sweet Coralline is a concentrated liquid supplement that feeds the major, minor, and trace elements coralline algae needs to spread and thrive, while gently raising pH and helping to stabilize alkalinity. That signature pink and purple encrusting algae gives a reef or FOWLR aquarium a mature, established look and competes with nuisance algae for hard surfaces. For steady core parameters, pair it with the Quantum Aragonite 3-part system and browse our full range of reef additives and supplements.
Why Reef Keepers Use It
- Feeds coralline algae. Supplies calcium, carbonate, magnesium, potassium, strontium, iodide, and minor trace elements in a single bottle.
- Buffers while it doses. Helps raise pH and stabilize alkalinity to support overall reef stability.
- Works across system types. Suitable for FOWLR, LPS, mixed, NPS, and SPS tanks.
- Clean formula. Made with deionized water for purity, produced by Quantum in Australia.
How to Use
Add 1 mL per 100 L (26 US gal) once per week, or as needed to stimulate coralline algae growth. Maintain pH between 8.2 and 8.5, and never raise pH by more than 0.2 in a single day.
Pro tip from Quantum: to spread coralline you already have, switch off your return and circulation pumps, then use a clean toothbrush to gently brush a small patch of coralline algae. Let the fragments settle onto your rock and glass, then turn the pumps back on. In time those fragments take hold and grow.
Target Water Parameters
| Calcium | 350-470 ppm |
| Alkalinity | 7.4-11.2 dKH |
| Magnesium | 1080-1450 ppm |
| Potassium | 300-410 ppm |
Choose Your Size
A little goes a long way at 1 mL per 100 L, so match the bottle to your system volume and how many tanks you dose. The 5 L is the value pick for large systems and frag rooms.
| 250 ml | Nano and small reef tanks |
| 500 ml | Standard reef tanks |
| 1000 ml (1 L) | Large or multiple tanks |
| 5000 ml (5 L) | Big systems and frag rooms |
Specifications
| Brand | Quantum |
| Form | Liquid coralline algae supplement |
| Key elements | Calcium, carbonate, magnesium, potassium, strontium, iodide, trace elements |
| Base | Deionized water |
| Suitable for | FOWLR, LPS, mixed, NPS, SPS |
| Reef safe | Yes |
| Dose | 1 mL per 100 L (26 US gal) weekly |
| Available sizes | 250 ml, 500 ml, 1 L, 5 L |
| Made in | Australia |
Recommended Pairings
- Quantum Aragonite A (Calcium), Aragonite B (Alkalinity), and Aragonite C (Magnesium) for your core reef parameters
- Quantum Bio-Enhance for biological support
- Brightwell Coralline Accelerator as an alternative coralline booster
- Browse all corals and saltwater supplies
Frequently Asked Questions
How soon will I see coralline spread? Coralline is slow by nature. With stable parameters, moderate light, and weekly dosing, most reefers notice new purple spots over several weeks to a few months.
Will it turn my rock purple overnight? No. Sweet Coralline supplies the building blocks for growth, and the algae still grows at its own pace. Consistency is what pays off.
Is it safe in a fish-only (FOWLR) tank? Yes. It is suitable for FOWLR, LPS, mixed, NPS, and SPS systems.
Does this replace my calcium and alkalinity dosing? No, it complements them. Keep meeting your tank's main calcium and alkalinity demand with a dedicated supplement such as the Quantum Aragonite system, and use Sweet Coralline to target coralline growth.
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Quantum Sweet Coralline
