Questionable algae on plants and aquarium walls

[Idgyroo]

I'm a new into aquarium life still lol and got this gem of algae in my tank.  I've looked into types of fuzz or hair algae but I'm looking for a direction.  Do I need to take action or let it do its thing.  I'm worried for the plants I don't want them to get starved out and lose photosynthesis and die. I have 4 Amano shrimp 4 ghost shrimp and one guppy.  I have recently treated for fin rot after my guppy poked a hole in his tail. I used maracyn. Problem was there before treatment.  Also using a finnex stingray light.  I occasionally used fertilizers. 

[Daniel]

The algae in the first photo is staghorn algae. I would just gently rub it off with my fingers.