Green water algae after no water change for 2 weeks (high tech)- how to treat root cause?

[MichaelJ]

Free floating is a misnomer. Green water is made up of Euglena, flagellated single cell photosynthetic eukaryote. They are suspended in water and capable of free swimming.

Euglena - Wikipedia

en.wikipedia.org

@tiger15 Interesting info. Thanks for posting.

 

[rebel]

I once had a green water problem. I paid $80 for a UV unit. Within one day the problem was gone. I have never had to use the UV since. I suggest you borrow the UV unit for one week and pay the owner $10.

 

[ceg4048]

Socrates 392 BC?

Was he in The Matrix ?

He and I spoke briefly. We met in a phone booth.
Along for the ride were Bill and Ted. It was their Excellent Adventure...

Cheers,

 

[rebel]

? phototropic maybe.

 

[MichaelJ]

? phototropic maybe.

Very fascinating footage. Makes you wonder what exactly constitutes complex if not intelligent life - albeit microbial. Some of these guys totally look like they are on a mission - while others just bounce around randomly.

 

[tiger15]

Euglena are complex single cellular organisms with multi functional organales. They evolved much later after the first photosynthetic cynano bacteria have been in existence for a billion year.

 

[rebel]

If the OP truly had an outbreak of Euglena, then increasing CO2 could make it worse?

It looks like Euglena can use CO2 to photosynthetise....?

https://www.ijert.org/research/co2-sequestration-and-growth-characteristics-of-euglena-gracilis-in-a-photo-bioreactor-IJERTV2IS110415.pdf

This might be especially true if they can occupy the upper parts of the tank and starve the plants in the lower parts of light, CO2, and maybe even O2. This assumes that flow is unevenly distributed, which it is in my tank due to the hardscape design.