Orange stuff on LR

[cwickham]

My LR has weird orange circles on it.. kinda dark redish orange.. and almost perfect circles?

im scared!!!


does anyone know what this is... i will be able to post pics when i get my camera back later on this week?


thanks
craig

[tlo]

probably coraline (sp?) algae. It comes in all sorts of colors, try a google search and see if thats it. It is a good thing, a sign of a healthy tank.

[mark]

I've got like a soft orange rust that doesn't seem harmful but there is this stuff.