Aquarium Red Lava Rock Moss Plant Reef Rock Cichlid Cave All water type safe, 10 Stones Aquarium Red Lava "Exotic Red"Rock 10 per case Create Caves for your aquatic pets hiding and birthing places Perfect for Aquascaping or Hardscape options, Safe for all water types This lava rock is known for its porous and unique characteristics which make the perfect home for coralline, fish and many other sea creatures. Rock sizes are from 7 inches to 2 inches long, some smaller for more decor options