Dark red patches

[DeepReef]

Just wondering what is this stuff on my LR, starting to have loads of patches all over the tank ?

 

[ryanjohn1]

Does it wipe or blow off relatively easily?

 

[DeepReef]

Does it wipe or blow off relatively easily?

No, I have tried toothbrush but wont come off. I thought might be coralline, usually they are pinkish colour, but mine is deep red.

 

[ryanjohn1]

There’s many colors of coralline algae. Just be sure it is cause it sorta looks like cyano

 

[tzabor10]

It’s probably coraline algae. I have a lot in that color. Enjoy!