Brown spots in Sump

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Do you have a picture?
 
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Welcome. This sounds normal for a new tank. Pics though...
black ish appearance GIF
 
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Likely mulm or sediment but pics under white light will be helpful with verification of what it is
 
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Welcome to R2R and the salty world. Hopefully the picture will bring some advice. Lots of knowledgeable and helpful people here who will support and advise you when needed.
 
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Hello @Capt502 and welcome to R2R!! Glad you joined us!! For some more advice on what to do about the brown spots, go to the New to the Hobby subforum especially if you consider yourself a beginner.
 
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IF YOU HAD TO OPERATE EVERYTHING ELSE MANUALLY, WHICH AUTOMATED SYSTEM WOULD YOU KEEP?

  • Auto top-off

    Votes: 55 57.9%
  • Automated dosing

    Votes: 6 6.3%
  • Mechanical filtration / roller filter

    Votes: 4 4.2%
  • Automated water testing

    Votes: 3 3.2%
  • Automatic feeding

    Votes: 1 1.1%
  • Lighting schedule

    Votes: 17 17.9%
  • Controller and remote monitoring

    Votes: 4 4.2%
  • Leak detection and emergency shutoff

    Votes: 1 1.1%
  • Automatic water changes

    Votes: 3 3.2%
  • None. I prefer to operate everything manually

    Votes: 0 0.0%
  • Something else (explain in the comments)

    Votes: 1 1.1%
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