Green Coraline?

[Musovski]

Any idea what this is on my rocks?

 

[Brad Miller]

Green coralline algae

 

[TriggerFinger]

Does it eventually turn purple? I didn’t know there was green coraline

 

[Brad Miller]

Eventually when the tank matures.
I believe others say that running alkalinity a bit higher, like 9 or so will increase the rate for purple coralline to grow.

Let's see what others have to say...

 

[Todvod]

Yep. Green coraline. There are green, red, purple, teal varieties. I think a few others as well. Did you get any purple coraline on your frags? I got mine from snails.

 

[Potatohead]

I also have mostly green coralline. Some purple, but mostly green.

 

[Saveafish]

Does it eventually turn purple? I didn’t know there was green coraline

Green, red, pink, blue, grey.