400/600/800gpdWater Purifier Reverse Osmosis System Water Purifier Machine Reverse Osmosis Water Filter Automatic Flush Aquarium System Note: We have a number of styles of pumps, positive is awfully good, and we carry them randomly. The equipment are barely diversified from batch to batch, but the function is the same. Feature: 1/600GPD/800GPDReverse osmosis membrane 2/600G/800GBooster pump three four water aquarium for modern family RO reverse osmosis membrane ·Function: Reverse osmosis membrane with pore size of zero micron can efficiently remove harmful ingredients reminiscent of bacteria, toxins, heavy metal ions and salt in water. Since the pore length of the RO membrane is one-fifth of a milligram (0 micron) of the hair filament, it is generally invisible to the bare eye, and bacteria and viruses are 5000 times more. Therefore, only water molecules and about a mineral ions favourable to the human body can pass. Other impurities and heavy metals are discharged from the waste pipe. The precept of contrary osmosis is to apply a strain more than the pure osmotic stress at the raw water side, in order that the water molecules are reversely infiltrated from the higher concentration component to the decrease concentration side. Since the pore length of the reverse osmosis membrane is much smaller than 1000's or maybe thousands of events greater than viruses and bacteria, diversified viruses, bacteria, heavy metals, solid solubles, infected organic matter, calcium and magnesium ions cannot struggle through the alternative osmosis membrane. Thereby reaching the purpose of water purification.