Ver-mex goes into the drinking water and is to be reccommended, this is a herbal remedy and you don't have to discard eggs after use.
Fluevenet is a different kettle of fish and needs eggs to be discarded after use.
WARNING!!!!! My nephew used fluvenet to worm his hens and, as usual, put the cleanings from his hen-house in the compost bin. All the earth and manure worms in the bin died!