Genesis Rock 4-Pack

Increase the overall filtration power of your tank by adding Genesis Rock to your system. 

Features / Specs:

• Designed For Fresh or Saltwater Aquariums
• 23,000+ Additional Square Feet of Bacterial Space For Each Rock
• 4 Rocks Included in the Set
• Reduces Phosphates and other dissolved organic compounds.
• Increased Beneficial Bacteria Colonies
• Zero Leach Technology - 100% Fired Ceramics