Chances of resuscitation for button polyp

[Ace Park]

I adopted button polyp known as salted agave zoa.
Once it adopted first, condition was good as below :
http://postfiles9.naver.net/20150924_216/l2cache_1443106214140giS3a_JPEG/IMG_8682.JPG?type=w2

Now it closed its polyp completely and shrunk noticeably over 1 week as below :
http://postfiles15.naver.net/20150930_254/l2cache_14435423008603WkhM_JPEG/IMG_8744.JPG?type=w2

Can I get any information or comment if there might be a little chance of resuscitation for this poor button polyp? All other corals and button polyps are very good in condition.
This polyp might be impacted once I added filter media in order to boost filtration capacity. A few of copepods have approaching on it from time to time but I am not sure what they're doing.

Brief parameter for the tank : 30 gal nano
dKH : 7.5
Temp : 79.7 F
NO3 : 0
phosphate : 0

 

[Dkuhlmann]

Access denied on pictures, can't really help without them

 

[Ace Park]

Images attached

Images attached

Access denied on pictures, can't really help without them

I adopted button polyp known as salted agave zoa.
Once it adopted first, condition was good as below :
http://postfiles9.naver.net/20150924_216/l2cache_1443106214140giS3a_JPEG/IMG_8682.JPG?type=w2

Now it closed its polyp completely and shrunk noticeably over 1 week as below :
http://postfiles15.naver.net/20150930_254/l2cache_14435423008603WkhM_JPEG/IMG_8744.JPG?type=w2

Can I get any information or comment if there might be a little chance of resuscitation for this poor button polyp? All other corals and button polyps are very good in condition.
This polyp might be impacted once I added filter media in order to boost filtration capacity. A few of copepods have approaching on it from time to time but I am not sure what they're doing.

Brief parameter for the tank : 30 gal nano
dKH : 7.5
Temp : 79.7 F
NO3 : 0
phosphate : 0

 

[RA]

What filter media did you add? How long has your tank been set up?

 

[Ace Park]

Filter media is live ceramic. It has set up 4 months ago.

 

[RA]

What's your salinity? Not much info to go on, I'm guessing that they are either getting too much or not enough light.