Platygyra Brain in Decline?

[tjs1974]

This was the specimen when I got it back in April.


http://i266.photobucket.com/albums/ii263/tjs1974/IMG_0871.jpg



Here it is today.

http://i266.photobucket.com/albums/ii263/tjs1974/DSC_0237.jpg


It's housed in my 70g mixed reef tank under a 4-bulb Teklight T5s. I haven't had any issues with any other corals, and all water parameters are normal. I can understand a change in color under different lighting, but I'm not sure what's causing the deterioration in the middle of the coral. I would appreciate a little input

[drawman]

Are you feeding it at all? If not that may help the tissue come back. How far is the coral from the light?

[syrinx]

Is it a flow issue?- looks like the area doing poorly is kind of a depression that detritus could collect in.

[Wetline]

For whatever reason those types of brains do not tend to like the T5 lighting from my experience. I've got the 4 bulb TEK retro on a 90 with two ATI blue +, one UVL actinic, one GE 6500 daylight. I bleached one type of favites brain to the point of almost killing the whole colony before I moved it in the shade which helped it hang in there but it's still not fully colored up. Another smaller favite colony bleached pretty bad but hasn't had any tissue loss. Since all this I changed my lighting schedule to 6.5 hours with one blue+ and the actinic, and the other blue+ and daylight bulb are only on for 4 hours. This change has prevented any further problems but neither have rebounded that great.

I'd try to shade it if you can. Good luck!