Found in sump

MapleLeafReefer

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I found this stuff on some live rock in my sump. I was removing the rock in favor of bio brick. Any idea what this is?

20210516_173538.jpg
 
AS

Have you ever had a reef tank with no sump and how did it go?

  • YES and it was just fine

    Votes: 356 58.6%
  • YES but it was difficult

    Votes: 105 17.3%
  • NO

    Votes: 135 22.2%
  • Other (please explain)

    Votes: 11 1.8%
Kessil
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