Originally Posted by tiredfish
...is there any safer way....
Unless the animal is in danger, do nothing. I know it can be irritating but it's one of the challenges you have to accept if caring for one of these.
In your case, being on a powerhead (?) was a potential for disaster. I would instead suggest aiming a powerhead at it's foot in the direction you want it to move. Nothing too strong, just enough to irritate the anemone some. Making the spot it settles on less than desirable is the best means in getting them to move. Also be sure any intake equip near it is turned off.