This is what always works for me:

1. Every day - Clean every little piece of hair algae that you can
see (by hand or using a toothbrush).

2. Every day - Adjust and watch very closely (check and adjust if
needed) the NO3, PO4, Fe, K, Traces.

3. Every day - Make sure your plants bubble heavily every day.

It's a question of giving a chance to the plants. Yes, it takes time,
but algae eating fish, a blackout and such are forceful approaches
that may or may not yield results.

--Nikolay