anyone with a magic cure or answer?

[Delphinus]

I went through it twice and am pretty sure I never took any pictures of it either (not the sort of thing you want to remember). The first time I had it, I tried everything (I mean everything) and nothing did anything for it. I had to do the tank-blackout thing several times before it went away permanently. The second time, well, it happened just as I was moving. The disruption of the tank move seemed to kick it. Although it was about a week before I was able to finish the wiring at the new place and get my halides going, so that might have been a part of it.

As far as cyano versus dinoflagellates ... I'm not sure that snails dying is a complete slam dunk for an ID. I think cyano will kill off snails too. One thing that sticks out in memory about dinos was that they literally disappear during the lights-out period. So if you're starting the day off with a clean tank but fininishing the day with gobs of goo everywhere, it's dinoflagellates. Cyano forms more sheets that cover everything, dinos can be a little more string-like. And bubbles everywhere, bubbles like crazy. And it doubles in population so insanely fast. I found I could siphon nearly 100% out of my tank, and within about 6 hours the tank would like I hadn't done it at all since it was completely back.