CaribSea Caribbean Crushed Coral 40 lb.
Caribbean Crushed Coral is formulated with millions of beneficial bacteria that support healthy marine aquarium ecosystems. It helps reduce waste and accelerates the cycling process in new tanks by effectively compressing ammonia.
With its fine grain size, this coral substrate is ideal for sand-sifting and burrowing organisms. It is gentle on sensitive marine life such as soft-bodied rays and sharks.
Product Features
| Feature | Description |
|---|---|
| Beneficial Bacteria | Contains millions of beneficial microbes to support aquarium cycling |
| Ammonia Reduction | Helps compress ammonia, speeding up the cycling process in new tanks |
| Grain Size | Small grains suitable for burrowing and sifting organisms |
| Compatibility | Safe for soft-bodied fish like rays and sharks |
| Available Sizes | 40 lb and smaller size for various tank volumes |
FAQ
How does Caribbean Crushed Coral help in cycling a new aquarium?
It contains beneficial bacteria that help break down ammonia, which speeds up the cycling process and stabilizes water conditions in new tanks.
Is this coral safe for soft-bodied fish like rays and sharks?
Yes, the fine grain size and gentle composition make it safe for soft-bodied fish such as rays and sharks.
Can I use this coral in a tank with burrowing organisms?
Yes, its small grain size makes it ideal for sand-sifting and burrowing organisms.

Jack Parsons –
The coral helped my new tank cycle faster than expected. My fish were active within a week, and water parameters stabilized quickly. The grains are fine and didn’t cause any issues with my shrimp or snails.
Christopher Lee –
I used it in a 55-gallon tank with a group of tangs and a moray eel. The water clarity improved, and the ammonia levels dropped noticeably after two weeks. It’s a solid choice for beginners.
Cameron Bell –
My soft rays have been thriving since I added this coral. It’s gentle on their bodies and the substrate holds together well without shifting during water changes.