The best method that I have found is to epoxy the base to a piece of rock. Then place the rock where you want it in the tank. The same can be done with fragging, drill a hole into a piece of rock and then epoxy the fragment into the hole.
It should be placed in an area of high water flow and should be fed at least a couple times a week. I use a turkey baster with a piece of tubing attached to spot feed it up stream. It gets fed a combination of Cyclopeeze, zooplankton, oyster eggs and Coral Frenzy. Other people report success with baby brine shrimp as well.
HTH