Current status on dosing Vibrant : Not so great.
Been adding Vibrant for about 2 weeks now.
The main change - A moderate outbreak of Cyano.

No visible change in algae or coral.
My Nitrates have gone down. They were already pretty low.
I did not check Phosphates unfortunately.
I have seen Cyano outbreaks before when Nitrates were super low, and Phosphates were not.
(Redfield ration)
So my theory is that Vibrant rather rapidly dropped Nitrates, but not Phosphates, helping the Cyano.
I have seen other people on RC report trying Vibrant and having a similar Cyano issue.