My LR is turning green, why?

[fishflop]

98 percent of the green hair algae in my tank has gone away. Now, my LR has a green color to it...obviously algae of some sort. my po4 and no4 is fine. what can I do to get rid of the color? Please don't say, "brush the rock". I can't take my tank apart again!!! Other than the color of the rock, it is beginning to look very nice. I wish that I had a "working" digital camera so that I could post a pic.

[Frogfone]

I haven't seen it for years but you used to get fiji rock that had green corraline on it. What does it look like? Is it growing on the rock? Attached to the rock or does it look like part of it?

Without a pic it's hard to say.

What are your Ca/Alk/Mg parameteres? Often you have to get these spot on before the nice purple corraline starts to grow and outcompete the nuisance algaes.

Sharon

[Gavin Smith]

I get some green coralline, it seemed to grown mainly when my Ca and Alk were low. Now I've raised them I don't think it can compete with the purple stuff.

Gavin

[fishflop]

I'm quite sure that it is not coraline. It looks like a concrete patio that has had years of water running over it and has turned green. I have taken a pic via my camera phone and will try to post it...however, I'm not sure that I know how. wish me luck.

[fishflop]

http://i52.photobucket.com/albums/g37/fishflopy/greenLR.jpg

I think I did it!!!

[cajen]

Nice effect, the purple and green together!

[fishflop]

My LFS suggested today that it might be green coraline as Gavin and Frog mentioned. I did try to brush some of the rock that the green is on and it would not come off. My LFS explained that some coraline will begin as a green color and then turn to orange, pink, purple, and even red.

[firefish]

i have the same effect but the green is only on the base/dead rock oh yes and on the glass - it's some sort of corraline algae
regards
jase

[KeithM]

is that live rock or reef bones? reef bones tends to go green before it gets colonised by coralline.. give it some time and it will colour up.

[aladdin]

I had some LR which was left out to dry, to get rid of the stubborn algae, and then re-introduced into the tank. It went green for a couple of weeks and then started to colour up once the coralline took hold.
As Keith Man said, give it time.

Cheers

[fishflop]

It is rather hard to tell if it is coraline or not. I have been having an algae problem for quite some time. Although there is not algae dirrectly growing off of the green. I definately have purple growing in the tank...but there is still significant hair algae. I just don't get it...very frusturating.