Replace the feed pump on your Osmolator auto top off with a water valve, which is basically a solenoid valve with 1/4" connections. There are two common ways to use the water valve; connected to a reservoir or directly to a water source like an RO/DI system. Option 1: Install inline between a freshwater storage container and your tank or sump. When installed this way, the valve will open when the Osmolator is triggered by a low water sensor. Option 2: Hooking the RO system up directly to the tank. There are two considerations for this. First, the RO system is going to be turned on /off for short periods, so it won't operate the most efficiently due to the TDS creep which will consume DI resin faster. This really is a personal cost vs benefit decision. Second, you're connecting a never-ending water supply to your tank which is not only a risk to your tank, but your home as well. While we can't eliminate this risk entirely, we can reduce it to the point that most people are willing accept it. Watch the video for full details on tips to reduce the risks. If you haven't already be sure to subscribe; we upload two reef related videos every week! Connect with us on Facebook: Check out our pics on Instagram: *Legal Stuff* The purpose and content of this video is to provide general information regarding the products and their applications as presented in the video. Aquatic sales solutions, inc. And its officers, directors, employees and agents disclaim all express or implied warranties, in any way, related to the products and their application as presented in this video, make no representation or warranty regarding the products and the application as presented in this video and shall not be liable for any direct or indirect losses or damages of any type, including but not limited to punitive damages, or from personal injury or death resulting from or in any manner related to the video, and the products in and contents of the video. The viewer expressly agrees that aquatic sales solutions, inc. And its officers, directors, employees and agents shall not be liable for any damages or losses related to the products in and content of the video and hereby agrees to hold the foregoing harmless from any such losses or damages.