The Royal Spa Float Tanks have been designed with three things in mind. First of all, we want to be the nicest experience to using a tank. Secondly, we want to be unbelievably low in maintenance. And thirdly, we want to have a great energy efficiency. We are focusing on the amount of air that comes through and circulates so you don’t get the claustrophobic kind of hanging air that makes some people uncomfortable. We are using multiple purification systems and a very simple filter that you can get at any pool place in the United States of America.