True, it may not be needed, but they are for different things. Metro is for internal flagellates such as heximita and spironucleus as you may know. The dewormers won't to anything for them. I am very unfamiliar with fish having worms, though it did say on the food page that fenben was for roundworms and praziquantel was for flatworms, and something else. I am not sure if those active ingredients will work on flatworms and roundworms at the same time. I believe that it is flagellates or worms in the fish and the fenben flake guidelines stated that it was targeted for roundworms and that no other foods should be fed. I figured that his best bet would be to treat simultaneously for flagellates and flatworms as this appeared safe when reading the guidelines for those foods. That's how I thought it through.
