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Be careful your flirting with Dino territory.
How big is the tank?
how long has it been running?
Fish?
clean up crew?
What @WWIII said. Dosing vinegar might get rid of the phosphates/nitrates, which will starve the algae. It can lead to other problems though. While hardly universal, lots of really difficult problems can arise from nutrients so low that algae can't thrive. Dinoflagellates are one of them, starving corals another. It would be a lie to say or even imply that vinegar causes these things, but an algae outbreak solution ought to be more thought-out than simply getting rid of the nutrients.
I would personally look into growing more desirable algae elsewhere, such as chaeto in a refugium or reactor, or turf algae in a scrubber.