Nature's Ocean Aqua Terra Black Sand 5 lb Bag, Natural Aquarium Sand
- Fracted Porous substrate for the aquarium.
- Specially fracted Porous substrate for the aquarium.
- Suitable for most marine and freshwater environments including reef and planted aquariums.
- Most effective when used alone as an integral substrate bed but may be mixed with other gravels or Sands.
- Not chemically coated or treated but does have a slight buffering capacity.