Coral Problem #1! Help!

[jpc763]

Ok, I have a mixture of corals (Softies, SPS, LPS) in my tank. I have been very careful to keep them spaced apart, but I have a couple of problems. I have this Branching Hammer that up until yesterday has been beautiful. Open and Full and looking really happy.
Here is a picture from January 2nd

Yesterday it started looking like this

Here is a picture of the placement of this coral in the tank.

On Saturday 12/29 I added a BTA which has found a spot it likes. Is it possible that the BTA has thrown off the balance and brought about chemical warfare that is affecting my Branching Hammer?

 

[puffer32]

They are far enough away not to effect each other. Is the hammer getting plenty of flow? They like alot of it. What are your water stats?

 

[jpc763]

The hammer has been in the same spot for months. Plenty of flow over that spot. Water parameters from Sunday 1/6
Temp80
Specific Gravity1.026
pH8.30
Ammonia0.00
Nitrate0
Nitrite0
Calcium400
dKH8
Phosphate (PO)0

 

[slugkeeper]

Does the flow cause constant movement and is it from one direction or from different directions?

 

[jpc763]

I have rotational flow from a Hydor Flo Attachment. There is one on each end of the 55g and a sump return along the bck wall. I did slightly increase the flow from the sump, but I cannot figure how that would affect it.
BTW, today is the same.
After dinner I am going to do some water tests. I will post results.

 

[jpc763]

Test Results for tonight
Temp 80
Specific Gravity 1.026
pH 8.40
Ammonia 0.00
Nitrate 0
Nitrite 0
Calcium 400
dKH 7
Phosphate (PO) 0