Okay. Thanks to @WheatToast help it looks like my tank is pretty well infested with Myrionema hydroids. The recommendations always suggest taking out the affected rock which I can do, but they are also growing on the wall of my tank. I’m trying to figure out whether I should (1) do a “rip clean” and essentially restart the tank or (2) try to pull out as much of the offending rock, scraping the walls and somehow collecting the hydroids, and manually cleaning it up.
Would really appreciate any suggestions. Thanks in advance!
Would really appreciate any suggestions. Thanks in advance!