For future reference, pulling an anemone out of a powerhead, as you found out, is the WORST thing to do.
You have to turn of the pump and let it work itself out. This is the only way to save the anemone and prevent a mess.
In the meantime, I would do a 50% water change and run some carbon, ASAP!!!
Another piece of advice: all pumps/powerheads need to be covered with sponge intakes, especially with newly added btas.