What is this?

[crlsjurado]

Hi,

I am wondering what this “purple” and “lime green” stuff may be? Started my tank beginning of this year and I have tried blowing it off but doesn’t blow off. Just want to make sure it’s nothing I have to remedy or worry about.

Thank you!

 

[threebuoys]

Purple is coraline, a good thing.

 

[shakacuz]

very likely coralline algae as mentioned. does it scrape of in pieces/chips, or is it patchy like grass?

 

[crlsjurado]

Purple is coraline, a good thing.

Nice! Thank you!

 

[crlsjurado]

very likely coralline algae as mentioned. does it scrape of in pieces/chips, or is it patchy like grass?

Does not scrape or blow off.