I have been designing a octo tank for some time now, trying to perfect a design thats unescapable. Now that the tanks figured out, Im left with few options. Seeing as how I live in Fl, I have the ability to collect my own live sand and possibly rock. Is this a bad idea? I have used the sand in my 75 and 29 with no problems. There is also the possibility of harvesting my own octo. Another bad idea? Can lace rock easily be converted to live rock? This stuff is awsome, and gave my ciclids a perfect home.