This is what im gonna do i wanna remove the CC bed from my wifes tank cause she wants a wrasse. Whats the best way to do this and how deep should i make the sand bed? Its a 3' tank I was thinkin put her fish and corals with rock in a rubbermaid when lights go out with 15 gal. of their water and dump the all the cc and water thats in the tank out and replace with sand and new water. Just like a giant water change simple right? Good idea or am i an idiot? Some1 please let me know if im gonna mess anything up i plan on doing this tomorrow night.