The 50GPD Barracuda unit from AquaFX is known as a world leader in RO/DI systems. The material selection has given way to systems that keep their structural integrity even after a decade of use, with only normal standard filter replacements. The filters used are also hands down the best in the world. When you need ultra-pure, laboratory-grade water for you aquarium, think AquaFX. Pair this system with a float valve and automatic shutoff kit (not included) for 100% automated operation. Features include: nuclear-grade color indicating DI resin (will change from blue/black to orange), panel mounted AquaFX pressure gauge, heavy duty aluminum mounting frame, Aqua Engineering & Equipment TFC RO membrane element, all quick connect fittings, and hose bib supply type. The AquaFX 50GPD Barracuda RO/DI system is hand-built in the U.S.A. using only top quality pressure fittings.