- Made of long-lasting, highly porous ceramic material - pH neutral 

- Suitable for both freshwater and saltwater filters - Effectively accelerates microorganism development; Removes ammonia & nitrites 

- Good for aquarium overhead filter media.  

- Can help reduce ammonia, nitrate, nitrite to have good crystal clear water. 

- For Trickle Filter, Sump, and hob. 

Size of large:  H16 x W3.5 x L3.5cm  

Size of small: H9.5 x W2.5 x L 2.5cm