But also pistol shrimp and bad stuff , I rather buy 3 brittle stars . I'm buying the rock for the maturity of the bacteria . The macro algae isnt helping you insta cycle . It was just a thought I had , I totally agree on the live rock being the best but I'm not paying $800 for 100 lbs of rock so I'm thinking what next best thing would be .No one buys cultured in the ocean live rock for the bacteria. They buy it from the quality and quantity of life on the rocks. Look at the pics, sponges galore, cool hitchhikers, some corals maybe and macro algae. That’s why they buy it.