Pink stuff growing on LR

[Marguerite]

Hello
Can anyone please help me with the ID of these pink stuff that is growing on my live rock?

[54seaweed]

looks like you got some coraline growing and yes its a good thing

[Marguerite]

Originally Posted by 54seaweed

looks like you got some coraline growing and yes its a good thing

Ok great. Thanks

[54seaweed]

I was looking more into the pict
over looked the rocks at the bottom , they look like they have cyanobacteria.

[Sniperhank]

If you can brush if off of your rocks, then it is cyanobacteria. This is a sign of low flow and excess nutrients in the water column.
Using ro/di water, weekly water changes, reduce feedings, and effective protein skimming will solve this issue, just like an algae outbreak.