Blue coralline?

[meir]

It's not spongy its coralline like I scrape it off my glass

 

[meir]

 

[meir]

It's a calcium based algae not spongy I felt it

 

[Arron209]

+1 on sponge.

 

[meir]

+1 on sponge.

It's not a sponge I felt it and it's definitely not a sponge

 

[meir]

this is the bottom of the rock its wasn't hit with light for a while so the coralline started dying off
Plus I got this tank from someone who set it up with dry rock and no livestock like it was an Rory tank other then deadrock so there's no way a sponge got in there

 

[Mrwilcox281]

Cool!! Blue coralline is awesome.

 

[Untamedrose]

If there is a will...or a reef tank there is a way.

 

[michaust]

+1 sponge

 

[ReefQueen]

Still a sponge, wishing it is something it's not doesn't make it so. I see you often ask questions and then argue with everyone about the answer. Just like the clownfish. Don't ask if you dont like the answers you are given. That is all, rant over.

 

[ReeferBee]

That looks like aged 'real reef' rock. Which is painted. A LFS near me uses it exclusively and this is exactly what it looks like after a couple of years.

 

[meir]

Still a sponge, wishing it is something it's not doesn't make it so. I see you often ask questions and then argue with everyone about the answer. Just like the clownfish. Don't ask if you dont like the answers you are given. That is all, rant over.

I'm not ranting I know what a sponge is and ik that it's not a sponge

 

[meir]

That looks like aged 'real reef' rock. Which is painted. A LFS near me uses it exclusively and this is exactly what it looks like after a couple of years.

I thought so too till it started to grow on the back wall

 

[clownfish chris]

Put it under a microscope and post the picture. It is a sponge without a doubt.

 

[Brandonlotz]

If you are entering a competition to win a prize for having blue coraline - you would then need a scientist to validate it, but if its for your personal pleasure maybe just accept it could be both

 

[clownfish chris]

@meir, I have just spent a little time going through your clownfish thread and your coral ID thread. From your profile, you look like you are 15 years old. Let me give you some advice; take it or leave it.

I was just a little older than you when I started posting on forums. I thought I knew it all. I was just like you arguing about everything thinking I knew. I once told an entamologyst that a mayfly he identified was not a mayfly but some sort of midge mayfly hybrid. Sound familiar?

I failed in much of what I did. I lost a reef full of fish. I got into legal and financial trouble. Heck, I lost a beautiful daughter because I wouldn't pull my head out of the sand and consider what others were telling me.

Fast forward a few years, and after learning to listen and consider what others are telling me, I became much more knowledgeable and much more liked. I am proud of my tank, my house, and my wife and son.

I have some run of the mill fish and coral. One of the most beautiful creatures I own is a pair of humble occ. clowns. I have some pretty spectacular stuff too.

I am successful in life now not because I know all the answers or because I follow all the advice I'm givin, but because I k ow that I don't know all the answers and consider what others are telling me.

My advice is to learn from my mistakes and know that there are other much more knowledgeable people out there than you. Treat everyone with respect. If you disagree don't call everyone haters, just let it go.

Good luck my friend.

 

[michaust]

Where's reef squad when you need them. You could also try this neat thing they made a couple years ago called Google to find your answer

 

[Tahoe61]

Definitely google Blue Coralline, there is information to be found. One example, see below.

http://www.reefcentral.com/forums/showthread.php?t=1772681

Quite honestly I am not sure what it is. Growth looks really unusually for sponge. Scrape some off and see if it turns into a powder when crushed.

I would like to see images under different lighting, that really could make all the difference.

 

[ReeferBee]

Man made rock, painted coralline. Show me it growing on your glass. All I see is algae

 

[Chris Adams]

That looks like aged 'real reef' rock. Which is painted. A LFS near me uses it exclusively and this is exactly what it looks like after a couple of years.

That is what I was thinking also. I believe OP mentioned it was on glass also?

Couple year old pic my tank
Not the best pic but if you look at most of rocks they are a purple. The lighter colored rocks are older real reef rock which is aged and will take on a blue tone in color.
Went to see if I had some I could take a pic of now but it is covered with corals
It would be nice if OP could get someone to look at it under microscope as someone else mentioned