mercredi 4 avril 2018

ID this algae

Hi! I'm new to this forum and am looking for some help. First off, hello from Western WI!

I just bought and installed a very established reef tank. The back wall of the tank was left to grow coralline and algae. The challenge is that there is this brown/black growth that I don't know what it is and how to get rid of it (outside of scrapping it off manually). Its so over grown that it has become the focal point of the tank! See link, let me know what you think it is and what you recommend.


https://www.youtube.com/watch?v=Y5WZge9rtQk

Thanks,
Dave


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