Ugly phase 7th week

[fazendas]

My aquarium has reached 7 weeks and without major warning, the glass, sand, and rocks are all brown/green. I scrape the glass in the morning and by the afternoon it’s covered again.

I suppose it’s official that the ugly phase has arrived.
Is this the ideal time to add copepods and a clean-up crew (CUC)?
Besides that, should I do anything else? Or is it just a matter of being patient and letting the aquarium follow its natural course?

 

[Kooma]

Test your water, when was your last water change?

 

[fazendas]

I'm doing 1 water change weekly (10%), since the cycle ended, so since the 4th/5th week. Last one was Sunday.
I only test nitrates for now, which are between 2–5 ppm.

Pictures in attachment.