Well, let me expound on those and see if you still think it's dinoflagellates.
What you see is strings of skinny caulerpa, with red fuzzy stuff growing off of it and lots of bubbles trapped in it. It really looks like dark pink wool, and I've never seen anything like this before. There's a lot of it, it's in the chaeto as well. Weird stuff. Plus there's a lot of cyano on the overflow to the pump/skimmer area and on the back wall. I scraped it off today and sucked out all I could.
If that sounds like dinoflagellates, what is the cure?
On a positive note, I bought Cyberwollf's T5 lights today, and they are SO much brighter than the PCs. Along with the LEDs I now have super lighting and lots of glitter lines without the heat and expense of halides. Hope my corals will be as happy as I am