Not yet, I actually just received my little $49 Amazon microscope w iPhone capability and some osteindishes so as soon as my back slams give me a break I’m gonna check and find out what I have exactly. Would you remind me exactly where to post the picture that I get for the quickest identification? I remember reading it somewhere but can’t remember where it was. Thanks!You are welcome. Sorry about the losses. Dinos in high nutrient systems is less common but does happen. I have seen it happen often in systems that were "treated" for cyanobacteria with something like Chemiclean. Despite the marketing, it is not a probiotic but an antibiotic -- erythromycin. It kills bacterial surface competitors leaving the door open for dinos.
Go slow on the phosphate reduction. Your corals slowly acclimated to the increasing levels and will stress if you reduce to quickly. Running carbon in the system is fine. It does nothing to directly affect dinos, it just helps minimize/remove some of the toxins they can produce. The phosphate binder does not remain in the system very long at all. It (Lanthanam chloride) binds almost immediately to phosphate and settles out as a precipitate crystal. It is a good idea to does to a sock to capture that stuff.
Did you do the coffee filter test to confirm it is dinos versus chrysophytes?