Still have not seen Sweeper Tentacle

Its been a week since I added Galaxia coral into my biocube 29. They are sitting up top of the tank getting good lighting, with good flow, they still are opened up, bright good colored green, but I failed to see sweeper tentacles yet, the longest I seen was maybe 1 or 2 inch and that was just 2 of them also.
My galaxia coral is around 6 inches long, so its a bit bigger then big your 2 fist together.

 

Give it time, they normally come out at night after lights are out. They will come out if they sense another coral nearby.