CaribSea Florida Crushed Coral 2mm – 5mm 40lb
Support stable water chemistry and superior biological filtration with CaribSea Aragonite Crushed Coral. This premium marine aquarium substrate contains natural aragonite, delivering significantly stronger buffering capacity than standard crushed coral, dolomite, or oyster shell. It helps maintain proper pH levels and reduces the risk of chronic acidity problems in saltwater systems.
The porous structure provides extensive surface area for beneficial bacteria, improving biological filtration and supporting a higher bioload. With long-lasting performance, this substrate is designed for extended use without frequent replacement.
Versatile Reef System Use
- Suitable for marine and reef aquariums
- Can be used in calcium reactors and plenum systems
| Specification | Value |
|---|---|
| Particle Size | 2mm – 5mm |
| Weight | 40lb |
| Material | Natural Aragonite |
| Application | Marine and reef aquariums, calcium reactors, plenum systems |
FAQ
What is the main benefit of using CaribSea Aragonite Crushed Coral?
It provides stronger buffering capacity than standard crushed coral, dolomite, or oyster shell, helping to maintain stable pH levels and reduce the risk of chronic acidity in saltwater systems.
Can this substrate be used in calcium reactors?
Yes, it can be used in calcium reactors and plenum systems due to its porous structure and natural aragonite composition.
Is this product suitable for reef aquariums?
Yes, it is suitable for marine and reef aquariums and supports biological filtration through its porous surface area.

Dan Randall –
I’ve used this substrate in my 55-gallon reef tank for over a year. The pH has stayed stable, and my tank’s biological filtration has improved noticeably. The coral growth is healthy and the water chemistry remains balanced.
Jennifer Paterson –
The coral substrate works well in my marine tank. It’s easy to mix into the sand bed and the water pH has been stable since installation. I didn’t notice any issues with sediment or clogging.
Adrian Lyman –
This product is reliable and effective. I used it in a calcium reactor setup and found it helped maintain consistent calcium levels. The surface area supports good bacterial colonization.