Is this coral dying?

[Neocold]

Just hit my 1 year mark with my first saltwater tank. I noticed this coral with this brown spot yesterday when I got home from work late at night.

What is going on here? Can I save it?

My understanding is this is a Graffiti Warpaint Favia? Corral identification is definitely not my strength.

Thank you for your time and expertise!

 

[Sophie"s mom]

I am no expert here by any means, but it does look to me like the flesh is receding! Hopefully someone with more experience will come in on this one.

 

[Gumbies R Us]

Do you have anything that could bothering it (cuc or fish)
Parameters?
What about lighting and flow?
How are the rest of the corals in your tank doing?

 

[DexterKarin]

I have a war coral that started doing this after I changed the flow. The hermit crabs were also really harassing it too. I moved to a corner with less flow and just left it and it healed up and is growing again. Glad someone told me not to throw it out but give it a chance.

 

[Neocold]

Do you have anything that could bothering it (cuc or fish)
Parameters?
What about lighting and flow?
How are the rest of the corals in your tank doing?

Only 3 fish at the moment. 2 clown fish and 1 Blue Eyed Bristlenose Tang. Last week I had a Diamond Sand Sifter Goby but that has disappeared sometime in the last week. It is either dead somewhere (it liked to sleep under the rocks after digging holes) or the hermit crab got it or both.

There are (or were) several small hermit crabs (hard to keep track of them) and one rather large Blue Knuckle Hermit Crab. There are snails of different breeds. And there is/was 3 Pom Pom Crabs.

Parameters
Salt 35 ppt
pH 8.6
Alkalinity 5.9 dKH
Magnesium 1245 ppm
Phosphate 0
Nitrate 16.9 ppm
Calcium 411 ppm
Ammonia 0.07 ppm
Temperature 78

Lighting is the same LED at the same strength it's been the last year. No change.

Same with flow. 75 gallon tank with 20 gallon sump holding approximately 13 gallons. Two return heads and two gyros (one in each back corner) with random flow patterns.

The rest of the corals are doing great!

I know my alkalinity is low but I have constant problems with high pH. I don't want to raise the pH more by adding baking soda. not sure what to do there....

 

[Neocold]

I forgot to mention that this coral is one of the originals. It has been in there somewhere around 8 to 10 months.

I have also been battling some cyano in the tank again. Been dosing with MicroBacter Clean the last week as I had great success with it last time I had cyano.