Can you identify?

[Aedanmor]

My son asked me today what the little red growths are in the tank. I did some research and I want to say it’s coralline but I’m not confident. Something tells me it’s not a good thing in the tank but maybe I’m lucky? Can you identify the red/rust colored stuff growing? It’s all over the place and it’s starting to grow off the rock almost like montipora.

 

[James M]

Looks like red sponges

 

[Swoody]

Some type of Macro Algae...does not look like anything bad I've seen pics of. You probably have nothing to be worried about. Are they thin leaf like growths? I had the same type in my sump at one point and they are harmless and most likely beneficial. Not Coralline either....

 

[PDR]

Do they blow off easily?

 

[reef lover]

Need a clearer pic

 

[Aedanmor]

Well I took a bit off and here’s one on a paper towel. Pretty small. Not easily removed and certainly not able to be blown off. Feels a little rubbery so guessing it’s algae. It’s prolific throughout the tank.

 

[Aedanmor]