also fyi no matter how much flatworm exit you use it won’t kill these guys. I had these years ago. I found no reef safe in tank cure. They well feed off any crustacean and invertebrate. So clams, snails, shrimp, crabs….
Well I had them in a 150g I pulled out all snails, crabs, shrimp. 4 months after pulling everything out I was still catching them in a bottle trap I made. I was never able to get them out of that system. They’ll also feed off pods cause those are crustacean.