Get SAEs.. they would eat up the hair algae in no time at all. However, the long term solution would be to increase Co2 levels to around 30ppm in your tank. I doubt DIY Co2 can reach that levels. Another solution would be to lower your lighting duration or maybe to have sort of a blackout during the day where you leave your lights on for 3 hours, off them for 2 and then turn them on for 3 again. These are just suggestion that i have tried and worked but it still depends on your tank conditions. If you could provide a list of your tank conditions then maybe we can help better. Provide Ph values, your fert regime.. etc