What is this growing in my tank?

[Doom21]

Lately I’ve noticed this weird stuff growing in my tank starting on the wood but now it’s spreading around. Can anyone help me identify what it is? 

[KBOzzie59]

Picture #1 looks like some kind of fungus.  Not sure what we are looking at in picture #2.  Picture #3 looks like roots from a stem plant.

[Doom21]

Yeah sorry, if my pictures are rough all pictures of are the fungus it’s growing on roots. Is it harmful? 

[Odd Duck]

It’s not a fungus.  That’s a Bryozoan, sort of like a very tiny tube worm type organism that’s a filter feeder.  They are not harmful at all, but they can overrun a tank a bit if they really like the conditions.  They should be easy enough to remove/scrape off things if you don’t like them but they’re considered a sign of a good ecosystem.  Congratulations are in order as long as you like them.

[Doom21]

Thank you very much, I wonder if they’ll survive then. My tank was having a massive algae bloom before I cleaned it out. I do think they’ve spread since then. They used to only be on the wood. 

[Odd Duck]

Only time will tell.  If they can get enough food from the water, they might.