Unknown Growth

[TheRompe]

My tank is 2 months old and all the parameters are perfect. I've an unknown light redish brown substance growing in spots on my live rock. Anyone have some thoughts what this could be or know what this is?

 

[Fish Fan]

I can't make it out in your pics, but reddish colored growth can often be cyanobacteria. Maybe this will help:


I hope that helps!

 

[TheRompe]

Thank you for your reply. Is cyanobacteria a good, bad or indifferent thing?

 

[Fish Fan]

Thank you for your reply. Is cyanobacteria a good, bad or indifferent thing?

Generally considered unwanted as it can look ugly and grow over corals and livestock. Like many things, it can be dealt with, so don't stress too much

 

[TheRompe]

Thanks. A local shop look at the pics and thought it was the 1st stage in coraline algae