Is this some sort of alge?

[BfishLpond78]

36 gallon BW tank with one GSP...May be hard to see but something is growing on my DW, it's either red or brown. If you can ID i would appreciate.

 

[Mr. Limpet]

36 gallon BW tank with one GSP...May be hard to see but something is growing on my DW, it's either red or brown. If you can ID i would appreciate.

Could be BA. Check out this site to ID and how to resolve.

http://gwapa.org/wordpress/articles/algae-in-the-planted-aquarium/