This may not be the answer you want, but it’s the right solution to your problem.
The algae is there for a reason. Your phosphates and nitrates are too high.
Removing all the algae without fixing those levels can make it worse because removing all that GHA will make those levels climb faster.
You want STABLE parameters and getting there works best with small, steady changes toward an acceptable range.
I’d scrub the rocks down with a toothbrush, cut back on feedings, add the skimmer (skimmer only export nitrates; not phosphates), and add something like a couple urchins to your CUC…then wait.
I left my tank for a month without filter socks while on vacation and my tank-sitter over-fed…a lot…the entire month.
I came home to a massive GHA outbreak in mid-February. I only scraped what I could reach without removing anything, added three smallish urchins, reduced feeding to every other day for about two weeks, and it was under control within about 6-7 weeks. I still have two small tufts, but everything else has stayed GHA free.