Replacement filters for this system. Full 6 stage Aruarium Filters Set 50GPD 192609778575. Filter cartridges should be changed every 6-12 months under domestic conditions.Filter life varies and depends on the water source quality. The item "6 Stages 50 GPD Aquarium Reverse Osmosis System RO DI + HM Inline TDS Meter" is in sale since Friday, November 30, 2012. This item is in the category "Pet Supplies\Fish & Aquariums\Filters".usa" and is located in Niagara Falls, New York. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Viet nam.