You’ve had those for a long time to have that many. I forget the name off the top of my head. But yeah they are supposed to be harmless. I believe that everyone has some sort of flatworm. Some are microscopic. I seen some at 40x and 100x.
In my 190. I tried to eradicate them. With flatworm exit...
I was just saying. Old stuff is new again. Like we forgot our way. I haven’t used a calcium reactor since 2002 ? Back then. Everyone had one. It was the only way to go. Then two part. Oh you can make it yourself out of stuff at home. Baking soda and driveway salt ( heat ). Used that forever...
You know the old is the new again. I honestly believe if we stayed on track in the early 2000’s with simple reefing methods. We would be in a lot better place now with our hobby. Don’t get me wrong. Something’s are really better. We lost the foundation of reefing. The solid core basics.
Anything can get a bubble / bounce. It’s actually a cancer deformity then if it cures the cancer the bubble goes away. I’ve had it on lots of corals. It’s very interesting.