May 24, 2020 #1 K Klaw29 New Member View Badges Joined Feb 29, 2020 Messages 2 Reaction score 0 Rating - 0% 0 0 0 Just found this all throughout my sump chamber on my rsm130. What is it?
May 24, 2020 #2 AcroNem 2500 Club Member View Badges Reef Squad Excellence Award My Tank Thread Joined Jan 1, 2015 Messages 4,469 Reaction score 14,517 Location United States Rating - 0% 0 0 0 Pineapple sponges, a Sycon species, totally harmless filter feeder.