Need help with brown/black algae

[Nicolas Sabrun]

Hey everyone,

Newbie here. ( well no entirely, just got back into reef keeping after awhile)

I am having issues with some brown/black algae. I can t get rid of it. I tried a peroxide dip ( 2:1 ratio) which took care of the green algae but didn t do anything to the other one.

My cleaning crew ( hermit and snails and urchin) are not touching this algae at all.

How can I get it out? I tried to brush it while doing a water change but no luck at all

The algae is mostly next to my green plate monti

Thank Specs;

20 g H
Nitate = 2ppm
Phosphate = 0.02ppm
Alk = 9.5
Calcium= 420 ppm
Mag= 1600 ppm ( tried Tech M but no luck either )

 

[bios]

Hi.
Best pics will help

 

[Duke4Life]

+1 to some better pics but it sounds like you have cyano.

 

[Duke4Life]

http://reef2reef.com/threads/cyanobacteria-questions-answers-and-solution.253823/

Take a look at this thread.

 

[Nicolas Sabrun]

Hi.
Best pics will help

Sorry I will try to get some better pics later on today

 

[Nicolas Sabrun]

http://reef2reef.com/threads/cyanobacteria-questions-answers-and-solution.253823/

Take a look at this thread.

I did but if it would be cyano, why did it survive the peroxide dip.

Unfortunately, I can't deep that rock again. It was too stressful on the corals.

 

[Duke4Life]

I don't know if a dip would do enough. Ask them on the thread I posted as they know much more than I do.

 

[bios]

I will say chyanophycaee to..
But best pics and a description
Will help

 

[Nicolas Sabrun]

I did but if it would be cyano, why did it survive the peroxide dip.

Unfortunately, I can't deep that rock again. It was too stressful on the corals.

I don't know if a dip would do enough. Ask them on the thread I posted as they know much more than I do.

Thanks for your help and sorry for the bad pics. Not so easy with a cell phone.

After doing more googling, I think you are both right about it being cyano. I never had to deal with it before. I had diatoms and GHA but not Cyano.

I will try the suggested treads.