IME, cyano and dinoflagellates go hand in hand and have had the same cause and fix in my system.
I've also had a thriving ATS and have had cyano and dino blooms at the same time.
I would not try and pin one thing to a species as diverse as dinoflagellates.
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rebuild and recovery log:
No more red house, you'll have to click on my name and visit my homepage!
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Current Tank Info: 180g mixed reef w/ a beananimal overflow to a dolomite RRUGF. | 20g long G. Smithii Mantis Tank
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