SPS disease or something else?

[Neo Jeo]

I have lots a lot of color in my sps over the past month. Now my beautiful blue oragon acro is turning slimy, white fuzzys, and just weird looking.

Today I did a water change and it came out of the water. I noticed a brown patch growing in between. Is this some kind of disease ??? I have a few other sps dieing from bottom to top.

also I don’t see any bugs on it looks like no pests.

any ideaS?


parameters:
1.026
Alk 9.2
Calk 420
Nitrate 7
Phos 0.12
PH 8.3

 

[DesertReefT4r]

Weird for sure. Not something I have seen before. Has anything at all changed with the tank?
Might be a good idea to dip it and see if anything comes off.

 

[Reeffraff]

Are you 100% certain you haven't ruled out pests, in particular AEFWs? It almost looks like the coral is covered in the telltale bite marks, but it's too hard to tell from the pics. Also AEFW eggs are a brownish color. Could that be what you're seeing the base of the coral? Try removing and dipping one of the problematic corals in a white container (or clear with something white underneath) and use a turkey baster to blow water at the coral. If there are AEFWs present they will come off the coral. The white container just helps you see them more easily.

 

[Neo Jeo]

Are you 100% certain you haven't ruled out pests, in particular AEFWs? It almost looks like the coral is covered in the telltale bite marks, but it's too hard to tell from the pics. Also AEFW eggs are a brownish color. Could that be what you're seeing the base of the coral? Try removing and dipping one of the problematic corals in a white container (or clear with something white underneath) and use a turkey baster to blow water at the coral. If there are AEFWs present they will come off the coral. The white container just helps you see them more easily.

I took some frags about that looked the same. Did a dip and nothing came off. I could not find any bugs...

 

[Reeffraff]

Can you provide some more details on your system? Tank size, bioload, feeding/dosing habits, water change schedule/salt mix brand etc etc.
Without knowing anything further I might look into letting your alk fall to more natural seawater levels (approx 7 dkh) and reducing any fish feeding/amino acid dosing. IME anytime my alk has creeped over 7.5-8, several of my acros responded negatively.