what would cause a torch coral to bleach?

My torch coral had an area that was white with its tentacles somewhat stubbier, now the white spreading? it looks like it's losing its zoothanthellae algae...any ideas?

 

Need a pic.

 

ok, here it is...

 

Is it new to the tank? Recently moved up high? Any changes to your lighting?

 

My guess would be that one of it's neighbor's doesn't appreciate the company.

 

+1 to ^^^

Aggressive corals need a bit of space for that very reason. You may need to isolate it in a lower-light area for a while. Hopefully it can recover.

 

I agree. The sweepers on the other corals next to it are know to be long and potent. Isolate in lower light.

 

It's been in the tank a while in that spot (about 6 mos. or so). I did just recently move the bubble coral and I think when the bubble fell, it may have gone into the torch - so, a new spot for it today when I get home!

thanks for the tips all!

 

Your very welcome mindy

 

well, my torch is all white now it still appears to be alive - any ideas on what I can do? I moved it to a lower light area and a little less flow .....it's just gone all white