Is my coral dying?

[Nalchadz]

Hello, I need some information about my coral. I think it is a toadstool coral but I am not sure. It was given to me as a gift from a friend about 2 months ago. This was my very first coral and it has been doing great. Polyps are extending and it seems really happy. A few days ago I noticed a small white spot but it's grown a little daily. It still seems healthy and polyps are fully extending still except for the edge where the white area is. Do I have cause for concern? Any help would be greatly appreciated. Current water info is below.

Tank Setup
29 Gallon BioCube
Live Sand, Live Rock, RO Water
Original Powerhead, Added extra Hydro powerhead, Protein Skimmer, UV Sterilizer, CPR Nano Tumbler Media Reactor, Heater.

Ammonia - 0
Nitrite - 0
Nitrate - 20
Salinity - 1.027

http://www.reefcentral.com/forums/picture.php?albumid=9061&pictureid=62643

http://www.reefcentral.com/forums/picture.php?albumid=9061&pictureid=62644

http://www.reefcentral.com/forums/picture.php?albumid=9061&pictureid=62645

[angelzntangz]

looks like something bit it

[Nalchadz]

the tank has 2 clown fish, 1 emerald crab, 2 Diamond watchman gobies, 1 fire shrimp, and 1 Banded Coral Shrimp. Do you think one of these is eating eat? I was told that they are all safe when purchasing.

[angelzntangz]

maybe the coral banded

[Nalchadz]

Is there any way to make him stop? am I not feeding him enough?

[RA]

I doubt that it's the shrimp. Do you have any other corals in your tank?

[Nalchadz]

Yes I do, I have a few other corals. They are all doing fine.

http://www.reefcentral.com/forums/picture.php?albumid=9061&pictureid=62667

[RA]

Did it fall onto another coral or was it in a spot where it could have been stung by a coral?

[Nalchadz]

No. It's always been in the same spot with no other corals around it. It's attached to the live rock so it can't fall off.

[bobidas]

Hi guys,

It's my first post :)
I have a similar enquiry, I have some coral, finger coral I think and it it has been droopy over the last few days.
All my levels seem fine. Salt was a little high at 1.027 so it's been lowered since. Currently on 1.021. I have attached a picture of the before and after.
Hoping someone could give me an insight.
http://http://twitter.com/YESYESYESWill/status/461765301798207488/photo/1
http://http://twitter.com/YESYESYESWill/status/461765591549091840/photo/1

Thanks!

[bobidas]

http://pic.twitter.com/ZaIBIMoLHO

http://pic.twitter.com/1Dz9uCl8CX

[bobidas]

Sorry guys,
Forum newbie.
http://http://postimg.org/image/t0bx7kxw1/

http://http://postimg.org/image/yihdgd9sd/

[bobidas]

[img=http://s30.postimg.org/4878lqkst/photo2.jpg] (http://postimg.org/image/4878lqkst/)

[img=http://s21.postimg.org/m8880z1tf/photo1.jpg] (http://postimg.org/image/m8880z1tf/)

[bobidas]

http://s21.postimg.org/d0fzk9urb/photo1.jpg