Seachem Reef Fusion 1 1.4L / 1 fl oz
Reef Fusion 1 and Reef Fusion 2 are designed to support a healthy reef aquarium system. Reef Fusion 1 supplies essential calcium, along with biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum. When used in combination with Reef Fusion 2, which provides alkalinity, the system maintains stable calcium and alkalinity levels necessary for coral growth.
Key Features
- Provides 100,000 mg/L of ionic calcium
- Includes magnesium, strontium, boron, iron, manganese, and molybdenum
- Supports stable alkalinity and calcium levels in reef tanks
| Component | Concentration |
|---|---|
| Calcium | 100,000 mg/L |
| Magnesium | Biologically appropriate level |
| Strontium | Biologically appropriate level |
| Boron | Biologically appropriate level |
| Iron | Biologically appropriate level |
| Manganese | Biologically appropriate level |
| Molybdenum | Biologically appropriate level |
FAQ
What is the role of Reef Fusion 1 in a reef aquarium?
Reef Fusion 1 provides calcium and essential trace minerals such as magnesium, strontium, boron, iron, manganese, and molybdenum. It supports coral growth by maintaining stable calcium levels and supplying biologically appropriate trace elements.
Can Reef Fusion 1 be used alone in a reef tank?
Reef Fusion 1 should be used in combination with Reef Fusion 2 to maintain both calcium and alkalinity levels. Using it alone will not provide alkalinity support.
What are the trace minerals included in Reef Fusion 1?
Reef Fusion 1 includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum.

Dan Underwood –
I’ve been using Reef Fusion 1 with Reef Fusion 2 for six months now. My corals have grown steadily, and water parameters remain stable. The calcium levels are consistent, and the trace minerals seem to support coral health well.
Brandon Ellison –
The product arrived quickly and the instructions were clear. I noticed a noticeable improvement in my live rock and polyps after adding it to the system. It’s a reliable supplement for maintaining calcium balance.
Evan MacLeod –
After switching from a generic calcium supplement, I saw better coloration and growth in my soft corals. The trace minerals included are a real benefit for reef health.