Greenwater... Maybe

My tank is green. But it gets slightly green and stays that one. The actual water i assure you is green but for 2 weeks now it just stays slightly green and doesn;t go full boar into greenwater or anything. The only way i can explain it is i let the tank run out of nutrients / co2 and then a couple week later pumped it full of everything again. Maybe the greenwater is just barely living and not propagating?

Anyways is there a way to get rid of the green tinge? Blackouts dont work it just comes back but never gets greener beyond a certain point.