New to saltwater wierd algae growth

[vorphex1010]

What is this growing on my glass

 

[sfin52]

Looks like coraline

 

[exnisstech]

Have you ever cleaned the glass?

 

[vorphex1010]

Have you ever cleaned the glass?

yea this is the back glass I’ve refrained from cleaning it off

 

[ReefEco]

Looks pretty typical honestly - looks like the inside of my skimmer before the annual cleaning, LOL. Likely a combination of coralline and other algaes. I wouldn't worry about it unless it starts to get nasty stringy hair-type algaes which can be unsightly. Or just scrape it if you don't like the look of it....