The AquaFX Add-On DI Single Canister with TDS Meter is designed to elevate the purity of your aquarium's source water. This essential component seamlessly integrates with your existing Reverse Osmosis (RO) or RO/DI system, providing a crucial final stage of filtration to remove any remaining dissolved solids. It ensures your reef tank receives only the cleanest, most pristine water, critical for maintaining a thriving aquatic environment. This advanced add-on unit comes pre-filled with nuclear-grade, virgin, color-indicating mixed-bed deionization resin, capable of producing ultra-pure 18 megohm water. It features a convenient refillable cartridge for easy maintenance and includes a sturdy mounting bracket for secure installation. The system is equipped with 4 feet of tubing and a backlit dual-TDS meter, offering real-time monitoring of water purity directly at your fingertips. Ideal for discerning reef aquarists and hobbyists dedicated to preventing nuisance algae outbreaks and protecting sensitive coral species, this DI canister is a vital upgrade. By consistently delivering water free from silicates, phosphates, and other contaminants, it supports stable water parameters and promotes vibrant coral health. It is perfect for those looking to enhance their current filtration setup or achieve the absolute highest water quality for their demanding saltwater systems.