[james_uk]

Hi I was wondering if anyone could i.d. this algae for me? I think i have two different kinds blooming at the moment.

thanks,

James

 

[rich815]

I believe both are BBA (Black Brush Algae).

 

[james_uk]

thanks rich, as soon as I saw your post I did some research into BBA and sources suggest it's due to lack of Co2. This would make sense since I don't inject Co2.

 

[jazzlvr123]

spot treat with flourish excel and you can get rid of it. It's not necessarily caused from a lack of co2 but fluctuating amounts of co2 say you are constantly changing your injection rate or doing erratic water changes etc.. BBA can be triggered

 

[Cavan Allen]

That looks like beard algae to me. BBA is soft, distinct tufts. Either can be easily defeated by co2 and a solid fertilization plan. A few threads about the subject are concurrent with this one.