Aqua Oasis Pool and Spa is a family owned and operated pool and spa retailer and installer located in Johnston, Iowa on Merle Hay Road. The business is owned by the Kohles family. Kevin Kohles has been a custom home builder in the Des Moines area for nearly 40 years. He and his wife Carol opened Aqua Oasis in 2008. Their son AJ and nephew Phil run day-to-day operations of the store and installations of fiberglass pools and Caldera line of portable spas.