DataGuru

that's a heavy fish load--plenty of ammonia for the algae to eat.

To clear it fast use a UV.
Daphnia in a breeder net should also work.
Floaters to cut down on the light and help suck up nutrients should also help.

Alex123

Of all the algaes, I will say I am now an expert at dealing with green water and fixing it in matters of hours. You can't water change it away. There is an imbalance somewhere, so water change just have it grow back. You can't black out it away. It killed my shrimps and weakens the plants. It's a lot of trouble and you wait days. So what's the remedy? UV and diatom filter would work but expensive. I created a home made filter that can be made in 5 minutes and clear water in a few hours. No need to wait weeks or months to clear. Basic idea is to run the water through you old worn sock or new sock for that matter. I posted detailed instruction in the algae section of the forum.
Once you cleared the water, adding floater and more plants will change the imbalance and fix the problem you have.

gr8nguyen1

i'm curios...some posts suggests that we turn off the HOB. can anyone tell me why. i thought activated carbon filters would decrease excess nutrients? how can they be responsible for algae outbreaks