Can I please have some help identifying this brown stuff that grows on the rocks around my pond (northeast Indiana)? I have searched the Internet, including the Texas A&M page that I’ve seen here, but most pictures have a huge green mat of something floating on the pond, and mine is usually just on the rocks. I use some copper to control the Chara on my beach, but the copper doesn’t make this go away. Any input on how to control this and when it’s best to do that would be greatly appreciated.
