Black Furry Stuff..!

[andyjc01]

Hi people
I have an established tank with good water quality.
I seem to have black furry stuff growing in tank.
Just wondered what it might be & if it's dangerous.
If so, what can be done to remove.
Cheers

 

[TallTree01]

http/www.aquascapingworld.com/algaepedia/full_view_algae.php?item_id=41

 

[DrRob]

Indeed, black beard algae would be a common culprit. Very difficult to scrub off, on plants often removing the affected leaf is the only way, but responds to increased CO2 levels if that's an option. Can also be blown away with local overdoses of liquid carbon or peroxide if done carefully.

 

[andyjc01]

Coolio people..!
Cheers for the kwik response!