Maroon Velvety Algea

[LilReef]

What is the name of, and what causes the maroon colored, velvety algea? (is it even algea?) It is easy to remove with a soft brush, but I've been having large outbreaks lately.

[foobuddha]

Do a search here on trt for cyanobacteria or cyano or 'red slime algae'. You should get a ton of threads.

[Harpo]

Ditto that, there are tons of threads about cyano. here. Be sure to syphon it out without stirring it much, it could grow where it lands. One cause is normaly a lack of water flow in effected areas.


Bill

[LilReef]

Thanks. The search gave me lots of reading on the subject!