Black and purple stuff on my live rock?

[alvintran]

I have had these black dots and patches on purple stuff on my live rock for about a week now (1 week after I bought the lr) The black stuff are just small dots spreading on the live rock, while there's nothing on the dry rock. There are also patches of purple on the live rock as well, can it be coraline?
I can't take pictures right now since I'm at school, but I will take some when I get home. Meanwhile, can you guys just throw out ideas to guess what it could be?
Thanks.

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[ReeferBean]

The black may be sponges and the purple may be coraline or cyanobacteria without a pic its hard to say.

 

[mike007]

Agreed.

 

[jezreex]

I have noticed black spots on my rocks tonight when I got home if it's a sponge do I need to worry about it? My tank is still cycling at the moment with zero ammonia but nitrite is still .05. Nitrate I checked is .20 I changed water last Sunday but it's still .20 today. Please reply thanks.

 

[NanaReefer]

Really hard to I.D. without actually seeing.


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[Drewbacca]

Same.. one last night after cleaning rock yesterday... now 20 today. Does others look like this as well?

 

[Drewbacca]

Size of Dip n Dot or various size circumferences of a broke off pencil tip.. from the point to the thickest.

 

[Drewbacca]

Had just cleaned cyano off my rocks with a stiff nylon brush yesterday and these had to be chipped/scraped off with the hard sharp corner of tweezers or the brush handle.

 

[Rick's Reviews]

Pics help vastly

 

[Drewbacca]

FYI.. that "rock" they are on in the above pic looks like a coral texture because it is a giant 18 inch total width branch of old coral that is a V shape and the size of someone's bent arm in the tank with their elbow in the sand.

 

[Drewbacca]

Anybody?... Bueller? My pics were in hopes someone knew what they were and to help the original poster to see if that's what he had as well. Any help is appreciated. My tank is in limbo waiting to know if what is populating on my rocks is OK to continue finishing my aquascape and gluing corals.. or should I take this opportunity to remove them and take a course of action to address If needed.
Thanks!

 

[Rick's Reviews]

Looks like Vermetidae snail.. do you have any corals

 

[Jekyl]

Looks like you have a brand new tank and some algae growing. IMO nothing to be worried about. Looks like cyano or sponges to me.

 

[Rick's Reviews]

Rhodophyta if new tank maybe, what inhabitants do you have

 

[Drewbacca]

Looks like Vermetidae snail.. do you have any corals

Thanks! The tank has been up for 8 months with precycled rock and bio blocks and spheres from previous setup.. so I never hit an ugly phase except some cyano which eco balance seemingly got rid of. I do have corals. They were mostly all on the sandbed because I kept having to put off gluing them to the rock and just got back from vacation and my friend had fed double and I came back to a nightmare and ended up tearing doen my aquascape and cleaning the algae coated sections only to keep as much beneficial as possible..
And then saw these reapear overnight..
I think you are right .. brs support also got back to me today and presumed the same.
I guess I'll just scrape off what I can and move forward. I've lived with them before.
Thanks again!