How To Euthanize A Fish Humanely. You should only flush a fish when it is already dead, if then. There are several methods on how to euthanize a betta fish.
Clove oil is a good alternative as it is readily available and causes quick death. We must remember a suffering fish has a poor quality of life. If you don’t know how to pith a fish, then don’t use this method.
You could choose to use alcohol or the clove oil method.
First, anesthetize the fish with clove oil so that it is sleeping and unable to feel pain; Our top 3 methods to humanely euthanize your beloved fish. If you don’t know how to pith a fish, then don’t use this method. Then introduce a clear grain alcohol like vodka to ensure the fish.