Seachem Reef Fusion 1
Reef Fusion 1 and Reef Fusion 2 are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1 provides calcium, while Reef Fusion 2 provides alkalinity. When used together, the Reef Fusion system will maintain calcium and alkalinity levels.
Reef Fusion 1
Reef Fusion 1 provides not only 100,000 mg/L of ionic calcium, but also includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum.
Reef Fusion 2
Reef Fusion 2 contains a mixture of carbonates and bicarbonates at an alkalinity of 4400 meq/L. It is designed to restore and maintain alkalinity in the reef aquarium and provide calcareous species with the essential carbonate needed for growth.
| Component | Concentration |
|---|---|
| Calcium | 100,000 mg/L |
| Magnesium | Biologically appropriate levels |
| Strontium | Biologically appropriate levels |
| Boron | Biologically appropriate levels |
| Iron | Biologically appropriate levels |
| Manganese | Biologically appropriate levels |
| Molybdenum | Biologically appropriate levels |
| Alkalinity | Provided by Reef Fusion 2 (4400 meq/L) |
FAQ
What is the calcium concentration in Reef Fusion 1?
Reef Fusion 1 provides 100,000 mg/L of ionic calcium.
Does Reef Fusion 1 include other trace elements?
Yes, it includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum.
How does Reef Fusion 2 support reef aquariums?
Reef Fusion 2 contains carbonates and bicarbonates at 4400 meq/L alkalinity, helping to maintain alkalinity and supply carbonate for calcareous species growth.


John Lyman –
Used Reef Fusion 1 and 2 together in my 50-gallon reef tank. The calcium and alkalinity levels stabilized quickly. Corals grew steadily over the last three months. No signs of stress or bleaching. Easy to dose and mixes well with other supplements.
Victoria Jones –
The product arrived on time and the instructions were clear. I’ve been using Reef Fusion 1 and 2 for two months now. My anemones and live rock are thriving. The calcium levels have stayed consistent, which is a relief after previous issues with fluctuating water chemistry.
Amelia Skinner –
This combination is essential for maintaining a healthy reef. I used it with a protein skimmer and the water parameters stayed stable. The trace elements in Reef Fusion 1 support coral health and coloration.