Yes, I know all to well the risks of everything posted lol. I know exactly how this bloom started and not sure if it's curable. ;Sorry
@taricha I'm not particularly familiar with dinos? I know the basics. I was curious though, if they shared common traits with different sub-species? I've read that the harmful ones typically spawn naturally in warmer seasons. Which sometimes warmer weather can cause coral bleaching and expulsion of zoox, as well. Assuming you guys have researched the life cycles of the flagellates; is reduction of temperature a possible route to maintaining them? Some researched showed that the Ostreopsis life cycle consists of 2 resting 'cyst' stages. One is non-dormant(2 day) and the other is resting(5 months) cysts.
The double-walled resting cysts were only able to germinate at 25 deg C. (77 deg F).
I was curious if any of this is typical with other species? Also maybe cell structure?
Have you identified yours as Ostreopsis, Amphidinium, or another genus?