After using a "professional pool/spa company" who could not seem to keep our spa crystal clear, we decided to search for a product that would eliminate the need for so many chemicals, and keep our water crystal clear. We could not be happier to have found Aero Spa. The product does exactly what it is designed to do and fits our wants/needs to a tee. Both Dave and Karl have been so helpful in defining exactly how the ozonator functions, as well as care and concern for the clarity of our spa. I have never experienced a company with such great service and integrity. I would and have highly recommended Aero-Spa to anyone who is frustrated about spa maintenance! I cannot say enough about what a pleasure it is to use little or no chemicals and have the water crystal clear each and every time we enter our spa. Thank you Aero Spa and thank you Dave and Karl for your continued support.