Orange microalgea on LR

[karen9570]

Have a recently developing orange growth on my LR....any thoughts?

 

[nuro]

any pics? my baseless guess would be a sponge

 

[pleasants9]

does your orange growth look like the stuff I posted on this forum? its the second photo
https://www.saltwaterfish.com/vb/showthread.php?t=336538