Seachem Reef Fusion 1 1L/34oz
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 provides not only 100,000 mg/L of ionic calcium, but also includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum. When used as directed, Reef Fusion 1 and Reef Fusion 2 will maintain the critical levels of calcium and alkalinity necessary for healthy coral growth, while providing biologically appropriate levels of other elements and trace minerals.
| Specification | Value |
|---|---|
| Volume | 1L / 34oz |
| Calcium Content | 100,000 mg/L |
| Includes | Magnesium, Strontium, Boron, Iron, Manganese, Molybdenum |
| Usage | Used in combination with Reef Fusion 2 for balanced calcium and alkalinity |
FAQ
What is the role of Reef Fusion 1 in a reef aquarium?
Reef Fusion 1 provides calcium and includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum to support coral growth and overall reef health.
How should Reef Fusion 1 be used with other products?
It should be used in combination with Reef Fusion 2 to maintain balanced calcium and alkalinity levels in the aquarium.
Does Reef Fusion 1 contain any trace minerals?
Yes, it includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum.

James Bell –
I’ve been using Reef Fusion 1 with Reef Fusion 2 for over a year. My corals have grown steadily, and water parameters remain stable. The calcium levels are consistently within the ideal range, and the trace minerals seem to support coral coloration and health.
Alexandra Skinner –
The product works well in maintaining calcium levels. I noticed a slight improvement in my polyps’ activity after adding it to the system. I still recommend pairing it with Reef Fusion 2 for full balance.
Simon Mills –
After switching from a generic calcium supplement, I saw better coral growth and fewer bleaching incidents. The inclusion of trace elements makes a noticeable difference in reef stability.