Reef Fusion 2 2 L — Alkalinity 4400 meq/L Dosage 2-Part | Seachem

Seachem Reef Fusion 2 in a 2L format is a concentrated alkalinity supplement based on carbonates and bicarbonates, with a concentration of 4400 meq/L. An integral part of the Reef Fusion system—the most concentrated 2-part system on the market—it is formulated for a 1:1 dosing ratio with Seachem Reef Fusion 1 (calcium). The 2L format is ideal for reef aquariums with high alkalinity requirements or for automated dosing with a dosing pump.

Main advantages

• Concentration of 4400 meq/L — the most concentrated 2-part system available
• Economical 2L format for aquariums with high alkalinity consumption
• Simple 1:1 dosing ratio with Reef Fusion 1
• Compatible with dosing pumps for automated maintenance
• Can be used separately to target alkalinity independently of calcium

Use in reef aquariums

The Reef Fusion system is designed as a complete solution for fundamental reef parameters. Reef Fusion 1 provides 100,000 mg/L of ionic calcium along with magnesium, strontium, boron, iron, manganese, and molybdenum. Reef Fusion 2 provides carbonate alkalinity at 4400 meq/L, essential for the growth of calcareous species. Together, they maintain critical calcium and alkalinity levels while supplying biologically appropriate trace elements.

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 at the same ratio.
• 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.

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 2 from ReefSolution?

For complete dosing, combine Seachem Reef Fusion 2 2L with Seachem Reef Fusion 1 2L in a 1:1 ratio. Automate your routine with the Kamoer X1 Pro Dosing Pump and check your parameters with the Salifert KH/Alk Test Kit or the Hanna Checker Alkalinity for precise and stable alkalinity maintenance.

Frequently Asked Questions

Is the 2L format more advantageous for large reef aquariums?

Yes. The 2L format offers better value for money for systems with high alkalinity consumption, particularly tanks dominated by SPS corals using a daily dosing pump.

Is the Reef Fusion 2 compatible with dosing pumps?

Yes. The product is liquid and compatible with dosing pumps. Shake well before filling the reservoir. Never mix Fusion 1 and Fusion 2 in the same dosing container.

Can Reef Fusion 2 be used alone to correct alkalinity?

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