Bubble coral stung by chalice?

[PlayaDelReefer]

This morning I found the right side of my bubble shriveled. I am wondering whether my hollywood stunner, which is only 2.5 inches or so from the bubble, stung it last night or whether it is something else entirely. This also coincides with a 40% water change I did yesterday evening where my salinity went from 1.025 to 1.028 (which I'm gradually bringing down with the addition of RO over the next several days).

As of yesterday, my parameters were good:

Phosphate: 0
Alk: 9
Ca: 430
Mg: 1215

Pics of the bubble and chalice:

[URL=http://s755.photobucket.com/user/jacktheripper819/media/1a.jpg.html][/URL]

[URL=http://s755.photobucket.com/user/jacktheripper819/media/1b.jpg.html][/URL]

[URL=http://s755.photobucket.com/user/jacktheripper819/media/1c.jpg.html][/URL]

 

[Mark9]

That stunner can easily have 5" sweepers at night.
You need to move everything away from it.
Here's a picture of mine at night.

 

[PlayaDelReefer]

Thanks Mark. I've moved the stunner a good distance away from everything. Fingers crossed that the bubble recovers.

 

[Optionman]

i recently got a large piece of that same chalice and its growing nicely. i've never seen the tentacles at night but heard they can get very long, thanks for the picture.