Aquanature Fish Lice & Anchor Worm Is The Most Effective Treatment For Diseases Of Fish Caused By Lice And Anchor Worms.When Used As Directed Will Not Harm Biological Filtration And May Be Used On Scaleless Fish. Usage- Exotic Native Fishes Like Arowanas,Gold Fishes,Koi Mostly Breeding In The Natural Ponds. In This Parasitical Attacks Can Derive From These Live Feeders And Environment As Well. If The Fish Are Left Not Treated, It Will Lead To A Lot Of Secondary Infection And Sickness Problems.Some Of The Problems Caused By Parasitical Attack Would Be Ulcer Growth,Fungus Infection,Forming Slime Etc.Fishes Contracted Such Will Lose Body Mass,Color And Then Eventual Fatality.