Lol, I've got some special "macro algae" for you... Only 20 dollars per golf ball...
Also have a bridge in Brooklyn for sale if you'd like that!
Just set up the aquarium, and don't fill it with store bought hair algae, that will come all by itself in time (not to mention it's a nuisance).
Also, a word of warning, filamentous algae (like hair algae or spirogyra, clado, etc) can injure and trap shrimp to death. I wouldn't purposely put it in any aquarium.