Odd alge growth

[Ulu]

I killed this off when I moved the affected tank to a darker room.
There was just too much natural, warm light.

I had the same typical LED aquarium lights, but the tank just got much less daylight.

After remodeling that tank went back to the front room.
Now it's starting up again. I'm going to distribute the contents to other tanks and sell it.
I don't want a tank in that room, seeing the light from 6 windows, pointing in 4 directions.

Bad juju.

 

[RD.]

Yrs ago when I had an outbreak I simply sucked it all out, replaced my bulbs with newer ones, and the outbreak ended.
Nothing else changed, not water changes, nutrient loads, or anything else, so it can really depend on what's going on in each system when cyanobacteria surfaces. Just take a close look at all the things mentioned & work backwards.

 

[dr exum]

I think some here have used rid-x or something similar to out compete it. What is your filtration

2 penguin 350’s and an fx4

Power head too

 

[dr exum]

2 penguin 350’s and an fx4

Power head too

 

[dr exum]

Great info, thanks all

The tank adjacent has no issues, tank is new set up, there’s been some heavy feeding going on, going to scale that back a bit.

I got most of it out last week with a water change but it’s came on strong...

Does co2 help this grow?

Gonna look into rid-ex