Ya, I don't feel like it could have cleaned up what we had. It may have maintained the population. We have a yellow coris wrasse that picks at them, but again to many. Thought about the 6 line but didn't want to buy a fish I didn't want to keep long term, I have seen to many mixed reviews on agression level. Down the road I might consider one. I do appreciate your feedback, thank you!Here is mine. Have not seen a single flatworm in the display and I am sure the wrasse is doing its job. Sorry I don’t have a better pic of my sixline