Reef Fusion 1.4 L — Ionic Calcium 100,000 mg/L 2-Part System | Seachem

Seachem Reef Fusion 1 in a 4L format is a concentrated ionic calcium supplement at 100,000 mg/L, enriched with magnesium, strontium, boron, iron, manganese, and molybdenum in biologically appropriate proportions. Part of the Reef Fusion system—the most concentrated 2-part system on the market—it is dosed in a 1:1 ratio with Seachem Reef Fusion 2 (alkalinity). The 4L format is the most economical choice for large reef aquariums and automated dosing systems with high calcium consumption.

Main advantages

• Concentrated ionic calcium at 100,000 mg/L with integrated essential trace elements
• 4L size — the most economical in the Reef Fusion range for large systems
• 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 long-term maintenance

Use in reef aquariums

Calcium is essential for the growth of SPS and LPS corals, as well as coralline algae. Reef Fusion 1 simultaneously provides ionic calcium and trace elements that are proportionally depleted in a reef aquarium. Combined with Seachem Reef Fusion 2, it maintains the calcium-alkalinity balance necessary for healthy coral growth, eliminating the need for separate trace element supplements.

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 complete, large-volume dosing, combine Seachem Reef Fusion 1 4L with Seachem Reef Fusion 2 4L in a 1:1 ratio. Automate your routine with the Kamoer X1 Pro Dosing Pump and monitor your levels with the Salifert Calcium Test Kit or the Hanna Checker Calcium for precise calcium maintenance.

Frequently Asked Questions

Is the 4L format the most economical for large reef aquariums?

Yes. The 4L format offers the best quantity-price ratio in the Reef Fusion range, ideal for systems over 200 gallons or SPS tanks with high calcium consumption and automated daily dosing.

Can Reef Fusion 1 be used alone to adjust calcium levels?

Yes. Seachem confirms that Reef Fusion 1 and Reef Fusion 2 can be used individually if your system has an imbalance between calcium and alkalinity.

What trace elements are included in Reef Fusion 1?

In addition to ionic calcium, Reef Fusion 1 contains magnesium, strontium, boron, iron, manganese, molybdenum and rubidium in proportions corresponding to typical usage rates in a reef aquarium.