Can anyone tell me what this is and how to get rid of it?

Pulcher

Plecostomus
MFK Member
Mar 18, 2007
556
39
61
Florida
This horrible brown algae looking stuff has taken over my java moss and is spreading to my java ferns and dwarf grass. I have ottos in the tank but they aren't touching it.

http://imgur.com/a/NlrJe
 
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