What is this Aglae???

[thirty5]

I have this dark red algae growing on my rocks. There is NONE on my substrate, nothing at all. I don't think that it is cyno it is not soft or slimy and no bubbles or anything. I also cannot get it off the rocks. I tried scraping it off and it is very hard to get off!

I am using RO water and my Nitrates, Nitrites, Ammonia are all 0.

I do not see any other issues with anything else all corals are open and fish are doing fine....

Any ideas???

 

[frnkynlop]

It looks like it might be cyano. does it look like has some bubbles in it?

 

[howze01]

I have coralline algae that color. Looks just like that

 

[thirty5]

I have coralline algae that color. Looks just like that

That is what I am hoping! I just tested all levels again and levels are fine.

The things that may appear to be little bubbles are not. My goby is always kicking up the sand and those are just little specks of sand that land on the rock! And I cant just blow or scrape it off!

 

[Imbarrie]

Take a turkey baster and try to blow it off. Or get some small tubing and try to siphon it off. If it comes off it's cyano, if it stays then it could be coraline or red algae.

 

[frnkynlop]

+1 with Imbarrie. good luck.

 

[thirty5]

Like I said earlier I cannot blow or suck it off. It won't come off. I do not have any type of your standard cyno my substare is spotless. If I try hard I can scrape it off with a sharp object.

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[Imbarrie]

Sorry didn't see that. You probably have coraline algae.

 

[cowfish]

+1 coraline algae

 

[Belwell]

agreed coraline, but also test to see if it comes off easy...

 

[Og Drogon]

Dint mean to hijack but since we are on the subject lol is this cyano???

and it comes off if I stir the sand.


Fix Your Fin Or Get Your Fin Fixed!

 

[thirty5]

Yes that looks like cyno. If its slimy and moves easily cyno. Lookes like something to stir your sand might help. Get some snails!!!