Red spots on live rock

Mrod91 · Jul 19, 2020

Noticed when I have only the blue lights on, my live rock has started to grow a lot of red spots on it. There’s more than this picture shows

Anybody know what it could be?

vetteguy53081 · Jul 19, 2020

Red algae.
Keep an eye on it so it doesnt develop into red Cyano bacteria

Billldg · Jul 19, 2020

Can you get a pic with less blues in it? Its hard for me to sat anything with so much blue.

HB AL · Jul 19, 2020

Just guessing from what's visible in the pics but I would say its coraline. A pic in all white light will help in getting a more accurate answer. Also you could blast it with a turkey baster and such and if it doesnt blow off its coraline or a coral attached.

esther · Jul 19, 2020

Some of my coreline algae will glow red at night under really blue light. It's hard to tell from your photo.

Mrod91 · Jul 19, 2020

HB AL said:
Just guessing from what's visible in the pics but I would say its coraline. A pic in all white light will help in getting a more accurate answer. Also you could blast it with a turkey baster and such and if it doesnt blow off its coraline or a coral attached.

I can’t really see it with the whites, couldn’t get a picture.
But with the blues it’s this bright maroon glow.. it’s starting to grow on all of the rock.

I will try with a turkey Baster tomorrow

HB AL · Jul 19, 2020

If its growing that fast it's probably cyano but it would be red under white lights too.

MarkyMark_ · Mar 3, 2021

Did you ever figure out what this was? I'm noticing these spots showing up on my rock as well

jacksin · Mar 3, 2021

Does it look like this? No one seems to be able to tell me what this is. Very difficult to remove, needs to be scrapped with a stiff brush

HB AL · Mar 3, 2021

Seeing those pics have you checked to see if its rust?

JosephM · Mar 3, 2021

It’s dying or dead coralline. I got it with my KP live rock and it slowly disappeared and when I move a superglued frag it’ll look the same under that.

MarkyMark_ · Mar 3, 2021

JosephM said:
It’s dying or dead coralline. I got it with my KP live rock and it slowly disappeared and when I move a superglued frag it’ll look the same under that.

That's interesting. I have only noticed these spots showing up a few days ago and they're are more now than then