Green-ish cloudy tank? Is it just a cycle?

[Lonster]

This happened to me once as well, I did water change after water change and it did not help. I added a uv sterilizer to kill the suspended algae and it cleared up in a week (depends on the size of the unit).

With saying that, there is a nutrient problem that caused the algae bloom and it will need to be addressed to make sure that it doesn't come back. I found that the algae kind of reached a tipping point that no matter how much I did water changes, it didn't clear up. Blacking out the tank I have read works well, but this is anotehr option for you.