Get it close to where you want it and plan on holding it there for about 5 miuntes. They will generally begin to seek out a footing, but as everyone has said, they will move around. I had one in the "perfect" spot for 6 months, then one day it up and moved. I lucked out since I like the other spot as well. Carpet anemones are not an easy creature to keep alive. High light requirements and need occasional feedings to prevent them from eating your livestock. FYI, a few of my fish have accidently brushed over mine and quickly died from the sting.