SeaChem Reef Fusion 1 – 1 Gallon (3.8 L)
Reef Fusion 1 delivers 100,000 mg/L of ionic calcium and includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum. This essential supplement supports the health and growth of coral and other reef organisms in marine aquariums.
Key Features
- 100,000 mg/L calcium
- Biologically balanced levels of magnesium, strontium, boron, iron, manganese, and molybdenum
- Designed to work with Reef Fusion 2 for stable calcium and alkalinity levels
- Recommended as a foundational supplement for reef aquariums
| Specification | Value |
|---|---|
| Volume | 1 gallon (3.8 L) |
| Calcium Content | 100,000 mg/L |
| Brand | Sea Chem Laboratories Inc. |
| Royal Item Number | ASM1209 |
FAQ
What is the role of Reef Fusion 1 in a reef aquarium?
Reef Fusion 1 provides essential calcium and trace elements such as magnesium, strontium, boron, iron, manganese, and molybdenum. It supports coral growth and overall reef health when used in conjunction with Reef Fusion 2 for alkalinity.
Can Reef Fusion 1 be used alone in a reef tank?
Reef Fusion 1 is designed to be used with Reef Fusion 2 for balanced calcium and alkalinity levels. Using it alone may lead to imbalances in water chemistry.
Is Reef Fusion 1 suitable for all types of marine aquariums?
It is specifically formulated for reef aquariums and is ideal for tanks with coral and other reef-dwelling organisms that require stable calcium and trace element levels.

Joshua Simpson –
Used Reef Fusion 1 with Reef Fusion 2 for the first time and noticed a significant improvement in coral color and growth. The calcium levels stayed stable over several weeks. Easy to measure and mix into the tank water.
Alison Walsh –
Good calcium source with balanced trace elements. Works well with my existing alkalinity supplement. My polyps have become more active and vibrant since adding this product.
Christian Wilkins –
The product arrived on time and the instructions were clear. After a month of use, my tank’s calcium levels remained consistent, and the corals showed no signs of stress or bleaching.
Jan Johnston –
It provides the calcium I need, but I found the trace elements to be lower than expected. May need to supplement with other products for full trace element balance.