The tips have colour, so I'm thinking it's okay. But, indeed, get it away from the powerhead. Also, make sure your powerheads are anemone-proofed so they don't have any parts that will suck up the anemone when it moves around.
Two timelapse videos taken of our GBTA shortly after we got it. Photos using a flash were taken ten minutes apart and strung together to show the movements of the GBTA at night....
Video of GBTA moving around at night and
a second video taken the next night.