What are these?

JPags

Well-Known Member
BRS Member
have all these white bumps on my sump. Any ideas?

868E4A02-709D-496D-A6EF-E60BDB5ED1A2.jpeg
 
Scypha sp. Sponges, I believe. They filter without needing a cleaning!
Usually are white and stay under 1cm tall.
 
Look like pineapple sponges. These have shown up in every tank I’ve had.

 
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