In my Fairy Kingdom, all fairies have to top up their innate born-with powers by drinking deeply from the Fountain of Youth in the Palace grounds on a regular basis.
Eileen and Hanastrew want the Queen to put in a second Fountain in a more accessible place for the more remote based fairies but the monarch has refused. She keeps a record of all who use her Fountain and expects all fairies to visit her Palace grounds at least twice a year. She does not see this as a hardship given all fairies can fly, most can use the instant transport charm successfully and there are always the public transport trees for those who like to travel at a slower, more secure rate. (The big problem with the instant transportation charm is there is no guarantee all your bits and pieces will reappear in the order and places they're meant to do so).
There is magic in the air throughout the realm so everyone does breath it in and that is as vital to existence as oxygen is to us but only fairies need the special water as well. Witches rightly feel this gives their chief rivals an unfair advantage but, unsurprisingly, the Queen sees no reason to change this.