CRYSTAL QUEST Mega Stainless Steel Single Replaceable Cartridge Countertop Water Filter system eliminates the impurities of tap water to offer great taste and pureness. The perfect solution for any household, it is quick and easy to install and use, attractive, convenient, and effectively removes many contaminants from water. This solid state water filter uses the latest technologies that blend the adsorption capabilities of coconut shell activated carbon with Eagle Redox Alloy and more. Water travels through multiple stages of filtration: In stage 1, water flows through pre one - micron filter pads (1 micron equals 1/25,000th of an inch), which remove suspended particles such as silt, sediment, cyst (Giardia, Cryptosporidium), sand, rust, dirt, and other un-dissolved matter. In stages 2 and 3, water flows through a bed of media made of a special high-purity alloy blend of two dissimilar metals - copper and zinc (Eagle Redox Alloy 6500, and Eagle Redox Alloy 9500.) In stage 4, water flows through the ion exchange resin, reducing heavy metals such as lead, copper, aluminum, and water hardness. In stage 5, water flows through granulated activated carbon (GAC). In stage 6, water flows through another one-micron filtration pad for further reduction of undesirable particles. The end result is a great reduction or elimination of a wide variety of contaminants. Conveniently provides 10,000 gallons (1-3 years, or when the flow of water will automatically either stop or slow down greatly.) Stainless steel filtration systems may need periodic maintenance to prevent corrosion from hard water, water with high levels of nitrates and high levels of iron. To prevent and rid your system of corrosiveness, quarterly cleaning should be done. This can be done using 9% white vinegar and warm water. Sumps and caps (as applicable), should be cleaned and rinsed well.