i chsngr 30-40% every other day

This is not a worm, but a crustacean) It is found on mostly pond raied fish, and I find them on wild fish I catch, especially Characins and othe Cyprinids. I treat with Prazicuartel, and Metrozol The Larvae can be killed with a 3ppt salinity (3 lbs salt per 100 gallon) The adults can also be...