Join Date: Jun 2020
Location: Middle Tennessee
I'll share my experience with hair algae, for what it's worth.
I have a low tech, heavily stocked planted tank: no fertilizers, no CO2, Eco-Complete substrate. I have some driftwood attached with a suction cup up at the top of the tank (this entire tank is set up to please Princess, my male dwarf gourami). This driftwood gets covered in algae, which I don't mind. The fish spend a lot of time foraging in it, and I like how it looks moving in the current. I prune it when I do my water changes. BUT the hair algae started spreading to my plants and really going nuts, so I cut down my lighting by about 25%. Its growth has slowed significantly, especially on the plants. Also, I swear some of the other plants are growing faster with the reduced lighting.
My take away - it seems that light supply, and also maybe height/distance, are the driving factors in my tank. Good luck!