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algae??

  1. Id?

    General Reef Discussion
    so i bought a new light for my tank today and it really illuminates the heck out of everything way more than my old one. found this red thing growin not sure what it is, it doesnt look like algae to me any ideas? hopefullyit isnt nething bad.
  2. Pests, Hitchhikers, and Diseases
    I have this velvet algae substance spreading on my rock. It is not hairy, it is smooth. It actually killed my green star polyp by covering it. Should I be concerned, if so how do I get rid of it?
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