Description
Quantum Aragonite A 1L — Litre Bottle of Liquid Calcium Supplement for Mid-Size Reef Aquariums
When a reef’s calcium demand climbs past what a 500 mL bottle covers comfortably, the litre is the next step, and Quantum Aragonite A 1L (SKU: QA101000) is the calcium part of the three-part Aragonite system at that size. It is a solution of calcium, strontium and barium in deionised water, the elements that make up aragonite skeleton, and it is meant to be dosed alongside Aragonite B for alkalinity and Aragonite C for magnesium. Each 1 mL per 100 L raises calcium by about 2 ppm, the same as the smaller bottles.
Quantum’s calcium target is 405 to 440 ppm, held by dosing 0.5 to 1.0 mL per 100 L daily and adjusting from weekly tests. The capful holds 10 mL. Two points of handling apply across the Aragonite A range: do not shake the bottle, and dose into high flow so the calcium is dispersed before it encounters the alkalinity part. The solution runs well through a dosing pump, which is how most litre-sized bottles end up being used. At 0.75 mL per 100 L a litre supports a 300 L reef for around fifteen months, or a 400 L system for nearly a year.
Usage & Application
When to Use
- Mid-sized reef systems: LPS, mixed and SPS tanks from about 200 to 400 L.
- Dosing-pump reservoirs: A litre fills a channel for months on a moderate tank.
- Growing stony coral collections: Tanks whose calcium draw has increased as colonies matured.
- Three-part converts: Keepers moving from two-part to separate control of calcium, alkalinity and magnesium.
Dosing & Administration Guide
- Measure, then dose: Set between 0.5 and 1.0 mL per 100 L per day according to how fast calcium falls between tests.
- No shaking: Pour or pump from the bottle without agitating it.
- Into strong flow: Add where circulation is highest, keeping Aragonite B and C dose points separate.
- Test weekly: Keep calcium at 405 to 440 ppm; 1 mL per 100 L equals about 2 ppm.
Product Specifications & Highlights
Key Features
- Calcium, strontium and barium: Dosed together in the proportions aragonite skeletons use.
- Known strength: About 2 ppm calcium per 1 mL per 100 L, unchanged from the smaller bottles.
- Independent control: One part of a three-part system with Aragonite B and C.
- Suitable for dosing pumps: Runs cleanly through automated dosers, which is how most litre bottles are used on a mid-sized reef.
- Litre bottle: With a 10 mL capful for hand dosing when the pump is being serviced.
Product Details
- Brand: Quantum (Reef Essential range)
- SKU: QA101000
- Barcode (GTIN/UPC): 0706502801250
- Product Type: Additives & Supplements > Calcium Supplement
- Net Volume: 1 L
- Dose Rate: 0.5 to 1.0 mL per 100 L per day
- Effect: 1 mL per 100 L raises calcium by about 2 ppm
- Target Range: Calcium 405–440 ppm
- Handling: Do not shake; dose into high flow, separately from the alkalinity part
- Dosing Pump: Suitable
- Capful: 10 mL
- Target Environment: Reef aquariums, dosed with Aragonite B and C


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