What is this? Id please

mejiamale

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Saw this growing in my sump. There is like 3 places it's growing. Is it safe?
04a62341767ed5f6481c511040c37baf.jpg
I'm new to saltwater so I didn't know where to look, but here. Thanks in advance.
 

DO YOU THINK TECHNOLOGICAL ADVANCEMENTS ARE MORE HELPFUL OR HURTFUL TO REEFING?

  • More helpful.

    Votes: 40 40.4%
  • More hurtful.

    Votes: 4 4.0%
  • I think it depends mostly on the technology.

    Votes: 37 37.4%
  • I think it dependsmostly on the reefer behind the technology.

    Votes: 33 33.3%
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