Algae ID - Dinoflagellates, or something else?

[rocknut]

I know that to definitively ID this, you would need to examine a sample under a microscope, but I'm hoping for some feedback anyway. Here is some brief background:

Noticed this algae start back in April, and I have approached it as Dinoflagellates and treated using three periods of light out (3 days at a time), I have also skimmed on the wet side, treated aggressively with GFO, added bacteria to out-compete, etc. Middle of June I went lights out for the third time, and treated the tank with Boyds Chemiclean. This seemed to totally eliminate any trace of the algae. I have slowly been ramping my light back up since then, and am noticing it start to reappear (now 5 weeks since I have seen it).

So, it has some of the characteristics of Dinoflagellates:
- it is brown in color
- has the air bubble at the end of a brown "string" (string is about the thickness of a human hair)
- would not be possible to siphon out I don't think as the only part of the algae that is not the bubble is basically a hair sized piece.

However:
- I have not noticed any snail deaths which usually go hand in hand with dinos
- I have not seen any of the "snot" like appearance that I see in most photos. I would describe it as spider web like honestly.
- I can still see the algae on the sand during the night with a flashlight (however, no bubble are present, just the strings).

So, some days I think it is some form of cyano, some days dinoflagellates.

Would appreciate any feedback on this.
Thanks,

Rocky

Here is the best photo I could get that shows the algae itself (bubble next to the yellow arrow). Can also see some in and around the coral - can also see the tissue loss resulting from lights out, alk swing, etc:

http://i283.photobucket.com/albums/kk301/rkrosschell1976/_DSF1292-1.jpg (http://s283.photobucket.com/user/rkrosschell1976/media/_DSF1292-1.jpg.html)


Here is another photo of the bubbles - keep in mind the color is off on this one, and the algae that you see other than the bubble is red wirey growth:

http://i283.photobucket.com/albums/kk301/rkrosschell1976/montialgae61914.jpg (http://s283.photobucket.com/user/rkrosschell1976/media/montialgae61914.jpg.html)

[Docdiggy]

I have something very similar right now. I am also thinking it's dinos. I have my t5s off and 72w of blue Leds running. The blue has stopped its growth and the corals don't mind. I have tons of tiny snails on it and none have died that I see. Mine had bubbles in it but, they were at the base and not the waving part of the algae. I've stopped changing water and only use my Leds for now. Whatever I have started when I went away for a few days and my neon dottyback found its way into the overflow then into the filter sock. It was mush by the time I figured out what happened.

[swk]

Sub'd

Same thing but a little further along. Thinking Dino's myself, but they seem to be going away. Keeping fingers crossed....

Just have to blow off some coral now and then is the worst of it