Geekpure 4 Stage Portable Aquarium Reverse Osmosis Drinking Water Filtration System 100 Gpd

4 Stage Reverse Osmosis water filtration system – Filter Precision 0.0001 micron, Removes up to 99% of contaminants ,e.g arsenic,lead,fluoride,mercury,cadmium,heavy metals and 1000+ contaminants,Special design for your aquariums use or residential use Deionization Filter – Mixed bed DI filter is used to further remove TDS from membrane filtered water. It is a high capacity mixed bed ion exchange resin, guaranteed TDS value close 0 ppm SMART SIZE – System Capacity 100 gallons per day @ 60 psi, it is around 260ml per minute. RO tube size: 1/4 inches. The ratio of pure water and waste water is 1:2. RO membrane is NSF certificated, to provide healthy and pure water. RO unit: Length 14.80 inch, Width 9.2 inch, Height 3.2 inch. What is 4 stage filter and function? the 1st stage: PP spun filter, Remove sand, dirt, sediment. the 2nd stage: Ro membrane, Removes up to 99% of contaminants including arsenic, chlorine, lead, fluoride, mercury, cadmium, odor, heavy metals, and 1000+ contaminants. the 3rd stage: Coconut carbon filter, Remove chlorine, taste & odors, very fine particulates. the 4th stage: Deionization Filter – Mixed bed DI filter is used to further remove TDS from membrane filtered water. It is a high capacity mixed bed ion exchange resin, guaranteed TDS value close 0 ppm. Where can I buy replace filters? Please search product ASIN B07KHWKVCS & B07G42FGJL on Amazon. There is not storage tank and faucet in the box. Because it is special design for aquarium use. What is in the box? 1 RO unit, diverter valve, 1 piece wrench, RO tubes, clips, drain clamp, teflon tape, and so on. BPA free? Yes, BPA free, food grade materials. Note: Please keep flush filters 30 minutes before it is used to feed for your aquarium. It Is Normal for Some Black Carbon Fines to Appear When You Flush Carbon Filter. There is not tank and faucet, and high/low pressure switches,the system can not work on and off automatically. If you want to add tank, faucet, switches, please contact with seller.