I know that some of you may have found some pieces of cholla wood online at places like aquabid. I was about to fork over their high asking prices until I was in Michaels Craft store with the wifey and what did I see?.....Cholla wood!! 12 inch pieces for $3.99. My red cherry shrimp love them! They are always playing on it. My fish like to peck at them as well. So if you want some cholla wood for your tank, then just go to Michaels.