Need help with algea

[jlaudiofreak]

I have been trying to figure out what kind of algae this is. It has taken over my tank and I am at my wits end I'm about to rip my tank down please help i. The algea is brown not blue

 

[tektite]

Looks like it might be a very thin type of dictyota, similar to this one:
http://www.marinelifephotography.com/marine/seaweeds/dictyota-acutiloba.htm

If so, its pretty hard to get rid of unfortunately.