AquaFX Reverse Osmosis Units are one of the most well respected names in the aquarium industry. In the store here at ClickCorals we needed a brand that we could rely on due to the large amount of fragile aquatic life that we keep. Not only that, but maintenance on dozens of tanks almost daily is no easy task. We needed a brand that would without fail register zero across the board when it comes to harmful compounds such as TDS, as well as not have us throwing away filters constantly. We found that reliability in AquaFx units and have been using them ever since. With over 45 years of water-treatment experience there are our go-to RO/DI units. Should you have any questions as which unit might be right for you, don't hesitate to contact us.