another rtn? :(

Yes, and two more frags are no longer displaying polyps, they just look like empty, but colored, shells. I'll post photos in a bit, I'm in the middle of a water change.

hmmm doesnt sound to good...something gotta be wrong in your tank

Some more photos;

My imperator cleaning off some algae, sweet little guy;
http://i21.photobucket.com/albums/b2...DSC_0027-2.jpg

My algae-eating tang (I love this guy, he eats everything but clams and coral. Couldn't ask for a better fish! My yellow damsel is also in this shot, it was one of my first 3 fish!
http://i21.photobucket.com/albums/b2...DSC_0038-1.jpg

RTN;
http://i21.photobucket.com/albums/b2...DSC_0056-1.jpg

Frags with no polyp extension;
http://i21.photobucket.com/albums/b2...DSC_0058-1.jpg

http://i21.photobucket.com/albums/b2...DSC_0059-1.jpg

http://i21.photobucket.com/albums/b2...DSC_0060-1.jpg

Clams are still happen and open;
http://i21.photobucket.com/albums/b2...a/DSC_0049.jpg

I'm still not sure why I'm experiencing RTN, its very quick and usually happens later in the evening or overnight. I am curious as to if I should just shut down this system and move everything back to my 24g cube, save for the tang and imperator angel. The GHA also doesn't seem to be coming back, any small left overs are very quickly being eaten by the tang.

I agree with Adidas, something is wrong, I just don't know what. Its like I can keep everything else, but SPS right now. Anyone else have any ideas?

why dont u bring some of the sps frags over, ill keep em in my tank for u and see if they recover? my sps is doing amazing. i can keep it until u are ready?

Thank you for the offer! I'm posting in the reef forum for suggestions right now. I'll send you a PM shortly.

no prob. also it looks like a bit of cyano in there, have you ever used Chemi-clean?

Nope, no Chemi-clean, I'm afraid of it actually!

oh man, its great i used it once and it killed cyano and all other nuisance algae.

I think I've terrified myself by reading too many bad accounts of its usage. Its not actually that bad, I just looked at it seems to just be on the tips of that frag and any dead frags that you can see on the background. I should probably take those out now I guess.