Substrate with irregularly shaped granules, with a diameter of 1-4mm.

• The dark black color provides excellent contrast with the vibrant colors of the shrimp
• Does not discolor the water
• Promotes the growth of bacteria, single-celled organisms, single-celled algae, and other microorganisms as valuable, natural food, especially for young shrimp
• Suitable for all tropical fish species and plants
• Prevents the formation of algae