The Bones 100GPD RO/DI System from AquaFX is an essential piece of equipment for maintaining pristine water quality in saltwater aquariums. This system removes harmful impurities, including phosphate and other contaminants, ensuring that your top-off and make-up water is pure and free of TDS (Total Dissolved Solids). The unit features a heavy-duty aluminum bracket and quick-disconnect fittings for easy assembly and maintenance. With its four-stage filtration process, which includes a 1-micron sediment filter, a chlorine guzzler carbon block pre-filter, an RO membrane, and DI resin, this system delivers laboratory-grade water quality that is crucial for the health of your reef inhabitants.