Hello All, I wanted to take a little time to introduce the RENEW™ Automatic Water Change System and its operation. If you have any questions about the system, please feel free to contact us here through the forum or through our contact page. The RENEW™ Automatic Water Change System consists of three major components: the Control Module and two Metering Reservoirs. Additionally, two small pumps are placed in the aquarium sump and the mixing bin to supply water to the Metering Reservoirs. Let’s first take a look at the Control Module. The Control Module is the nerve center of the RENEW™. This is where the user tells the system how many gallons of water to exchange and how long to take to perform the change. The Control Module also provides information to the user, such as the number of gallons that have already been changed, the states of various water levels, and what stage of an exchange the RENEW™ is performing. The Control Module also alerts the user to any problems that the RENEW™ may have encountered during the water change sequence, such as a low water level in the mixing bin or sump. As you can see in the pictures above, there are four buttons, a power switch, a numeric display, and several LED indicators on the face of the Control Module. Our goal was to make the user interface as intuitive as possible. The button on the left allows the user to set whether to perform the water change over the course of a day, a week, or as quickly as possible. The two buttons on the right simply adjust the number of gallons that the user would like to change. The center yellow button is the “GO!” button. It also is used to pause, cancel, or resume a water change. It’s actually the only button used for a water change. When initially depressed, it will start the water change. A second momentary press of the button will pause it, and a third momentary press will resume the water change. Pressing and holding the yellow button for three seconds will cancel the water change sequence, and pressing and holding for five seconds will cancel a sequence and order the system to empty the contents of the Metering Reservoirs. As you can see, it is straightforward and intuitive to interact with the RENEW™: simply set the number of gallons to change, set the duration, and press the yellow button. The RENEW™ then goes to work. Taking a look at the bottom surface of the Control Module there are two AC outlets for the pumps. Also present, although hidden from view, are five receptacles for cables from the Metering Reservoirs, Level Sensors (optional or included with the Advanced and Pro models), and a communication cable that connects to the STORM™ Specialized Top Off and Replenishment Module if present. The STORM™ is outside the scope of this thread, but briefly, it is an automatic top off device that was designed to interact with the RENEW™ - it can discern whether water is being intentionally removed by the RENEW™ for a water change or whether it has evaporated. It will not attempt to top off with fresh water if the RENEW™ has removed the water from your sump. The Metering Reservoirs are mounted to a solid surface above your sump and mixing bin. They receive the water from these sources and ensure that exact amounts are exchanged. Within the Metering Reservoirs, level sensors allow the Control Module to monitor the RENEW’s™ operation. There are two level sensors in each of the Pro model’s Metering Reservoirs, and one in each of the Basic and Advanced models’ reservoirs. As mentioned above, there are three models of the RENEW™ Automatic Water Change System: the Basic, Advanced, and Pro. The Basic model comes with the Control Module, Metering Reservoirs, two flow control valves, and all necessary mounting hardware. Simply add two pumps and tubing and you can start enjoying the benefits of automatic water changes right away. The Advanced model adds two Level Sensors to protect your pumps and other equipment from running dry, plus two of our unique Level Sensor Mounting Assemblies that adjust to tank lips from ½” to 2-1/4” wide and provide infinite sensor height adjustability within the tank or bin. Finally, the RENEW™ Pro includes additional Level Sensors within the Metering Reservoirs, increasing redundancy and expanding the Control Module’s capabilities. These additional sensors allow the Control Module to speed up the water change cycles and to make sure that the system is behaving exactly as intended. There are many, many reasons for doing water frequent water changes. But why might you want the RENEW™ Automatic Water Change System? Here are just a few reasons: 1. Numerous small water changes eliminate large temperature, salinity, and pH fluctuations, among other parameter swings. Large “all-at-once” water changes can severely stress the inhabitants of your aquarium with parameter swings and the influx of raw trace elements and minerals! 2. Organic waste doesn’t have time to be metabolized in the aquarium, so less organic material goes through the nitrogen cycle and ends up as nitrate or other organic compounds in the aquarium. 3. Trace elements and minerals are added as they are depleted, so there is a more uniform concentration of the elements over time. 4. It isn’t necessary to turn off any of your other equipment – skimmers, reactors, filters, pumps, sterilizers – they all stay on, all the time. 5. Your corals and other critters aren’t exposed to air and possibly intense lighting, both of which can quickly damage the fragile tissues of many corals. Additionally, the toxins they exude to protect themselves are not produced. Those are some of the benefits to your aquarium, now how about some of the benefits to you? 6. No more lifting heavy buckets. Your back will thank you. 7. No more dripping or spilling water all over the floor. Your spouse will thank you. 8. More time to do other important things! Whether it’s time spent enjoying your aquarium, cleaning skimmers, or time spent with your family – you’ll have more time to do it. 9. You can enjoy the peace of mind that the RENEW’s™ redundancy provides. 10. Hey, it’s easy to do a water change now, so it’s more likely to get done! You’ll enjoy the benefits of a healthier, more stable aquarium. Please visit our website Genesis Reef Systems to learn more about the RENEW™ and options, including money-saving bundles. If you have any questions, please feel free to contact us here through the forum or through our contact page. We look forward to hearing from you!