Hard brown/greenish dookie spots on DT

[tthnow]

Its only on the lower portion of my DT. I tried to rub it off with a mag but no go. Its not film algae, as I do not have any nor dino, or cyano. Does any know how to eliminate it?

 

[scattered]

Sounds like coralline algae but without a picture...



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[tthnow]

I took a pic and its impossible to see it. Its rust color, do corraline come in rust? I have had red in the past but not dookie brown.

 

[scattered]

I took a pic and its impossible to see it. Its rust color, do corraline come in rust? I have had red in the past but not dookie brown.

Rust, brown, red, orange, purple, blue, etc. coralline comes in all colors.


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[Kriegad]

Razor blade if glass tank. Don’t use a razor blade on acrylic. Be careful around seams.