Our most popular rock by far, Pukani rock offers the best value for most people because it is very light for its size allowing you to purchase less. It is pest free and easy to work with (cut, ship, etc.). Using a chisel or Dremel it is extremely easy to change the shape, create caves, etc. You can even use a hacksaw to cut a flat side for a nice even base or glue two rocks together. To Cure Pukani: 1. Place in dark container 2. Add saltwater 3. Add a heater 4. Add flow (just about any powerhead will do) 5.Wait about a month for the process to complete (when testing the water it should have 0 ammonia). 6. Do a 100% water change to get rid of nutrients that accumulated in the water column during the process. Additionally if you choose you can add a liquid bacteria product like Bio-Spira to help speed up the process. Connect with us on Facebook: http://www.facebook.com/BulkReefSupply Check out our pics on Instagram: http://instagram.com/bulkreefsupply