Cyno or Coraline?

[mikestanked]

Just noticed these smallish deep red blood-orange spots today. Good or bad?
I'm running a 30" marineland double bright LED non-reef.
Also I only have 1 550gph power head, but its pointed right over these new spots?

Sorry pictures aren't great, "it was a funny angle"
^any fans of the movie SNATCH

 

[Convict2161]

Love the movie, don't wanna go off topic though. I can't really tell, the purple or the red?

 

[carried]

If it rubs off easily it's cyano if it doesn't it's coraline.

 

[Keithhjs]

Hard to tell by pick. I agree see if it can be wiped off.

Btw. Snatch is one of my favorites. Add in Lock, Stock, & Two Smoking Barrels and your good to go!

 

[mikestanked]

the first pic is a little better its the two "blood red" splotches. will try and wipe it tomorrow.
is cyno very bad, can it over run a tank? will my emerald crab chow down?

 

[crister13]

Cyano isn't bad. Its bacteria. It's technically good for your tank but will only grow in bad conditions.

 

[obscurereef]

could it be this?

FORAMINIFERANS
These little filter feeders are very common on live rock in a reef tank.

 

[mikestanked]

No, it looks like cyno. Its an algea for sure

 

[crister13]

Cyano isn't algae actually. It's bacteria.