Both the red and green forms of algae I see in your photos are not "bad" micros. They are actually beneficial, and a great eed algae for a refugium. The best solution to these is either a mithrax or two, or a small yellow tang. Of the two, I'd go with the mithrax (emerald) crab.
If the algae is too coarse, the hermits won't touch it. The snails really prefer film algae on the glass, but will reluctantly go after hairlike algae when hungry.
Nassarius snails are carnivorous. They will not touch algae, unless it smells like fish food. Nassis are great sand stirrers though and a good addition to any tank, albeit not long lived.
I would avoid sally lightfoots. They will eventually outgrow the tank, get too hungry, and start ripping nibblets of corals.