The AquaFX Carbon Block Filter 20 x 4.5 serves as the crucial second stage in your reverse osmosis (RO) or RO/DI water purification system. This high-performance filter is engineered to effectively remove a wide range of contaminants, including chlorine, fluoride, pesticides, herbicides, and other volatile organic compounds (VOCs), while also eliminating bad tastes and odors from your source water. Ensuring pristine water quality is paramount for the health and stability of any saltwater reef aquarium.

Crafted from high-purity coconut shell activated carbon, this filter boasts an impressive capacity, capable of processing up to 20,000 gallons of water at 2ppm chlorine. It removes 99% of chlorine, taste, and odor, protecting sensitive RO membranes from damage. Features include food-grade, non-shedding polypropylene fabric to filter carbon fines and impurities, food-grade materials that are BPA-free and environmentally friendly, and a silicone O-ring designed to prevent bypass. It can withstand a maximum water temperature of 140F (60C) and a maximum pressure of 120 PSI, requiring replacement every 4-6 months.

This carbon block filter is an essential component for reef aquarists and hobbyists who demand the highest quality water for their marine environments. By consistently providing ultra-pure water free from harmful chemicals and impurities, it supports the delicate balance required for corals, fish, and invertebrates to thrive. It is ideal for anyone setting up or maintaining an RO/DI system to safeguard their precious reef inhabitants from tap water contaminants.