I had switched my leucs fully to bean beetles from hydei for a few weeks, because fly production was a little low, and I have way more beetles than I know what to do with. The leuc viv has been infested with nemerteans for over a year and a half, to the point that each day when I come into the room, I'd see dozens on the glass despite removing visible nemerteans frequently. About a week after feeding bean beetles I started seeing a marked decline in nemerteans. It has now been nearly a week since I saw my last visible nemertean. This is exciting for me, though I doubt they will ever be completely gone. I wonder if I can now get some microfauna reestablished? I'm afraid that might just get the nemertean population booming again because they'll have a food source.