Identification help

[Ernie C]

So I have this weird algae or bacteria. Looks slimy. Brown in color. Doesn’t seem to spread much.

 

[code4]

Bump, I have seen that in my tank also. Anyone know?

 

[Ernie C]

Here are some other pics

 

[Oscar Bravo]

I had that I my aquarium for a while. I got tire of looking at it and started to blow it off and let it go down the filter. Replaced the filter. So far I have its mostly gone.