My guppies and Platy's get the occasional hair. They normally pass it it just fine. I never pull it out. You don't know how long the hair is and how far it is in your fish. I have lightly pulled and if it comes it comes. If not I break the hair so it's not sticking out of their mouths. Idk how my girlfriends long *** hairs sometimes get into my tanks but they do. None of my fish have ever gotten sick or died from this.