I fed my tank with a small pinch of the fenbendazole flakes around noon today. First time feeding these flakes—the fish ate them up. I checked the tank 11 hours later with the lights out and saw what looks like two flatworm bodies floating around the water column. I assume if this was during the day those flatworms would be picked off the fish. I was not sure I had flatworms since I dip everything but this seems to confirm their presence. So far no issues with any of the fish, snails, shrimp, or crabs.