(Didn't make it, please close) sebaia anemone H. Malu

[ponokareefer]

I've found with anemones that when you try to put them upright and in a different position, it is a good idea to turn your powerheads off for a while until the anemone can get a good hold of something. After that, bring one powerhead on at a time. Otherwise, it may just continue to get blown around. I'd definitely recommend getting a container of sand, digging a hole in the middle, and putting the anemone in there. Sebae's like to be able to retract in the sand if they feel threatened.
As others have pointed out, I wouldn't recommend putting this in another tank, and I'd hold off feeding it now for probably at least a few days of being in the same spot.