i have to secnd this,,,12" is skinnny in a reef design,,,especially in a larger tank. i would recommend 18". you will be happier in the long run.jimeluiz said:For reefkeeping most find that a DEEPER tank from front to back provides the needed space to build a more functional and attractive aquascape. The fish will enjoy caves and overhangs to take shelter in and you will enjoy the more attractive depth of field. When the tank is too narrow you generally wind up with a simple pile of rocks...
HTH
and welcome!