Scrubbing algae is just part of normal maintenance, all aquarists deal with it.
You can reduce its growth with water changes, and keeping lights off when your not there. But even then, there are species that grow in low nutrient water, and species the grow in low light. Some species are green, some brown, some red. Some help keep certain pollutants down in your tanks, and are a positive thing.
Had a text book in my microbiology classeson just the species of algae in the great lakes, there are hundreds of species of algae in each lake alone.