These started showing up in my sump not sure what they are???
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Thanks!I don’t know but I want to so I’m commenting to bump it to the top

Thanks!!!!Those are sponges. These grow in most tanks and are usually harmless
I will probably post one soon in my microscopy thread.
Here are other posts with similar "root-like" structures:
• https://www.reef2reef.com/threads/help-id-this-white-root-like-thing-in-my-sump.294030/
• https://www.reef2reef.com/threads/what-are-these-white-roots.467758/
Good filtering sponges. They’ll grow in dark places and are a good sign!Thanks!!!!