Best green water I grew was outside, in the sun.
I did run some power out there and had a small air pump going. I kept topping off the tank with used aquarium water.
When I added live Daphnia they ate all the green water algae. I had to keep harvesting Daphnia to feed to the fish and then the green water would recover, but then the daphnia culture would rebound, too.
i keep forgetting to put the bucket out in the sun
i added a scoop to the aquarium
16 hours intense light, ... and crystal clear water
have been adding fertilizer.
a few days ago i noticed some bladderwort, ... so i'm assuming that's the culprit now. -removing all that i see i see