the fenben also kills fungus/biofilm, I would do a month or 2 of fenben and start with a 2 week schedule first and then skip 2 weeks and do a 5 day schedule every 2 weeks. moxi kills all stages of active larvae including adults , but it does not kill all the encysted ones. fenben is not that effective on adults , that is why the vets kept me on ivermectin with fenben. Now I am just taking moxi once a month and just returned from a 2 week vacation and feel great (first one in 3 years). I think I just got a few more months where I have no more encysted ones as I really don't feel them anymore.