Coraline Algae turning green

[trainfever]

What would cause purple Coraline to turn green? The back of my tank was covered with Purple Coraline and now it has turned green, Anyone have any ideas what would cause this? Thanks

 

[reefkprz]

sounds like its getting over grown by another type of algae, to me.

 

[fish3]

yeah just scrape it off

 

[trainfever]

Anyone else want to chime in?