OK, here we go:
Six line- no
Velvet slug, yes, but if you have any current at all, they eventually end up in the sump or who knows where, but they vanish.
Blue damsel- no
Arrow crab-nope
Green Mandarin-took one and spit it out
Flatworm Exit- multiple treatments and still... NO
Melanarus- I haven't seen him eat one, but it appears that the flatworm population is shrinking.
These results are for the red/pink/orange flatworms, not AEFW
Six line- no
Velvet slug, yes, but if you have any current at all, they eventually end up in the sump or who knows where, but they vanish.
Blue damsel- no
Arrow crab-nope
Green Mandarin-took one and spit it out
Flatworm Exit- multiple treatments and still... NO
Melanarus- I haven't seen him eat one, but it appears that the flatworm population is shrinking.
These results are for the red/pink/orange flatworms, not AEFW