Bro, same problem as me....high nutrient in water.,..below are some things I have done.
1. Introduced a fleet of cleaning crews...shrimps, snail, starfish, urchin, but from my observation "best" is Tang...they eat non stop.
2. Start phosphate reactor to reduce the phosphate content...a bit kaisu...I added another bag of Rowa media in sump...
3. DIY using a metal mesh brush to scrup away the algae (brush can buy from diaso)
Hair algae seems to lessen now....will update as it get lesser....