The AquaFX Barracuda RO/DI System 200GPD is a high-performance water purification unit designed specifically for saltwater reef aquariums. This advanced system produces ultra-pure, laboratory-grade water with zero total dissolved solids (TDS), effectively removing harmful impurities like phosphates that can plague a delicate reef environment. It is essential for creating pristine top-off and makeup water, crucial for the health and stability of your aquatic ecosystem. Hand-built in the USA by AquaFX, this 4-stage filtration system boasts a 200 gallons per day flow rate. Its comprehensive purification process includes a premium 1-micron sediment filter, a specialized Chlorine Guzzler carbon block pre-filter, a USA-made TFC RO membrane, and AquaFX's mixed bed color indicating Zero TDS DI resin, also sourced from the USA. The unit is further enhanced with a pressure gauge, quick-connect fittings, a 10-inch canister filter wrench for easy maintenance, and a durable heavy-duty aluminum mounting bracket. It can also be configured with specific carbon types to address either chlorine or chloramine in your tap water. Recognized as a top choice in the industry, the AquaFX Barracuda RO/DI System is ideally suited for residential reef enthusiasts, ranging from dedicated weekend hobbyists to professional aquarium service companies. Its ability to consistently deliver zero TDS water ensures the highest quality foundation for a thriving and vibrant reef, making it a cornerstone for serious aquarists committed to optimal water parameters and the long-term success of their aquatic inhabitants.