Reef Fusion 1 1 L — Ionic Calcium 100,000 mg/L 2-Part System | Seachem

Seachem Reef Fusion 1 is a concentrated ionic calcium supplement at 100,000 mg/L, enriched with magnesium, strontium, boron, iron, manganese, and molybdenum in biologically appropriate proportions. It is part of the Reef Fusion system—the most concentrated 2-part system on the market—with a simple 1:1 dosing ratio with Seachem Reef Fusion 2 (alkalinity).

Main advantages

• Concentrated ionic calcium at 100,000 mg/L with essential trace elements
• Includes magnesium, strontium, boron, iron, manganese, and molybdenum in biological ratios
• Simple 1:1 dosing ratio with Reef Fusion 2
• Compatible with dosing pumps for automated maintenance
• Can be used separately to target calcium independently of alkalinity

Use in reef aquariums

Calcium is essential for the growth of SPS and LPS corals, as well as coralline algae. Reef Fusion 1 stands out from traditional calcium supplements by simultaneously providing the trace elements that are depleted in proportion to calcium in a reef aquarium. Combined with Seachem Reef Fusion 2, it maintains the calcium-alkalinity balance necessary for healthy coral growth.

Dosage

• Dose every 1 to 2 days. Shake well before use.
• Add 1 ml of Reef Fusion 1 per 25 L (6.5 US gallons) in a high-current area. Wait a few minutes, then add 1 ml of Reef Fusion 2 per 25 L.
• Each dose provides 4 mg/L of calcium and 0.176 meq/L of alkalinity.
• Maintain calcium between 380 and 420 mg/L and alkalinity between 3 and 6 meq/L (8–17 dKH).
• Do not exceed 4 ml per 25 L per day.

Guaranteed analysis (per gram)

• Calcium: 95–105 mg
• Magnesium: 5 mg
• Strontium: 0.1 mg
• Boron: 0.020 mg
• Iron: 0.0005 mg
• Manganese: 0.0001 mg
• Molybdenum: 0.0005 mg
• Rubidium: 0.014 mg

Manufacturer's precautions

• Never mix Reef Fusion 1 directly with Reef Fusion 2
• Add the two products to separate locations in the aquarium.
• Make significant adjustments gradually to avoid shocking the corals and invertebrates.

Available formats

• 500 ml
• 1 L
• 2 L
• 4 L

Why choose the Reef Fusion 1 from ReefSolution?

For a complete dosing system, combine Seachem Reef Fusion 1 with Seachem Reef Fusion 2 in a 1:1 ratio. Monitor your levels with the Salifert Calcium Test Kit or the Hanna Checker Calcium and automate your routine with the Kamoer X1 Pro Dosing Pump.

Frequently Asked Questions

Can the Reef Fusion 1 be used alone without the Reef Fusion 2?

Yes. Seachem confirms that both products can be used individually if your system has an imbalance. Reef Fusion 1 targets calcium, while Reef Fusion 2 targets alkalinity.

What is the difference between Reef Fusion 1 and Reef Advantage Calcium?

Reef Fusion 1 is designed for the 2-part system in a 1:1 ratio with Fusion 2, at 100,000 mg/L. Reef Advantage Calcium is a standalone powder supplement with a calcium concentration providing +12 mg/L per 5 g dose per 150 L.

Why does Reef Fusion 1 contain trace elements in addition to calcium?

Magnesium, strontium, boron, iron, manganese, and molybdenum are included in proportions corresponding to typical reef utilization levels. This allows these essential elements to be maintained without additional supplementation.