White film on anemone tentacles

[yishi]

I have a green BTA and there is a white film forming on its tentacles since last week. Here’s how it looks like at night and lights off. Is it a sign of bleaching?
I’ll take another photo in the morning. The other BRTA is doing fine.

I added them a month ago.

Nitrate 15
Salinity 1.025
Temp 78

 

[yishi]