her tank

Hey guys!
A bit of help needed. I have some flatworm issues in my tank. They seem to mainly be living on my frogspawn, but there are a few stragglers roaming around on the glass, and even the carpet anenomies. I know a blue velvet midi is suppossed to feed on them, and that's been considered. But, im not sure the midi would go cruising around on the frogspawn, open brain, or carpet anens after them. I've done the whole sucker trick and gotten some, but they retreat ...