Should I be concerned?

[gideon2086]

The pictures birds nest has been in the tank for about three weeks now and has been doing great. This morning I noticed some bare spots. The polyps are otherwise extended well. Nothing has changed in the tank. Other corals, including an acro appear to be happy. What do you guys think?

 

[Reefpuck]

Hard to tell from the photo. Something picking at it?

 

[gideon2086]

Hard to tell from the photo. Something picking at it?

That was my first thought but I’m not sure what would. All reef safe fish and a fairly standard CUC crew that shouldn’t be starving.

 

[vetteguy53081]

Tissue loss and may be several factors:

High salinity
High Kalk
too much water flow
PH low
sting or being picked on

 

[gideon2086]

Tissue loss and may be several factors:

High salinity
High Kalk
too much water flow
PH low
sting or being picked on

Salinity 1.026
Ph 8.1-8.2
I did move a mp40... but it’s on the opposite side of the tank.
I don’t monitor kalk.. did you mean alk?

 

[dtruitt]

Weve got a pocillopora crab that hangs out in our birdsnest. Hes cute but it's all bare where he likes to hold.

 

[gideon2086]

Weve got a pocillopora crab that hangs out in our birdsnest. Hes cute but it's all bare where he likes to hold.

I do have some emerald crabs but I’ve never seen them up that high.

 

[vetteguy53081]

Salinity 1.026
Ph 8.1-8.2
I did move a mp40... but it’s on the opposite side of the tank.
I don’t monitor kalk.. did you mean alk?

Alk

What test kit(s) are you using ?

 

[gideon2086]

salinity - hannah
Alk - Hannah
Ph - apex