BTA arms twisting

[astpierre]

Two of the arms on my Rose Bubble Tip Anemone twisted off. Could the power head be causing this? I moved the power head so it was no longer right behind the anemone.

Tank Parameters

40 gallon tank
Salinity: 1.024
PH: 8.24
Ammonia: 0
Nitrates: 0
Nitrites: 0
Calcium: 420
Temp: 77.3

Photo attached

 

[jbirdman]

mine does this it loses only one at a time probly lost maybe five but were they fall off they are growing back i moved my power heads around and even took one out so far it still looks good