I took one look at the tank and am certain you should not dose anything at all, you should fix the algae directly, outside the tank, vs inside the tank, by lifting your rocks out and doing a special step to kill it, not just brush it off
the reason you have algae isnt due to a bad param, we can see that detail in the pics posted. you have no systemic param issues, you are growing exactly the amount of algae a balanced reef with no grazers and totally hands off a year would grow. do not zap this tank, clean it our way, the right way for max longevity.
i assure you doing what the oldest nano reefs in the world do isnt a waste of time here. vibrant touches all actors in the reef, targets and non targets
our way handles those rocks like reef teeth
they have gum areas that dont need the profi angle
and they have a few spots that do. we'd scrape, rinse, peroxide the spot, rinse, put back, and non targets were never harmed at all.
consider your sandbed, are you going to clean it or let it store up just the same until prompted for action
we could do a nice catchup top to bottom rip clean here, for strong effect on the tank.