RO Standard Refillable Housing + 5 LBS Anti-Scale Filter Media Bag Reverse Osmosis Standard Empty Clear Refillable Housing + Anti-Scale Filter Media Bag Refillable Standard Clear Housing Size: 2.5 inch x 9 4/8 inch- Fits most standard 10 inch housings and most RO systems ( note:Filter housing is empty, you need to fill the housing with Anti-Scale Filter Media bag ) Anti-Scale media, used to sequester water hardness, inhibit precipitation, and formation of mineral deposits in pipes & appliances. Siliphos Anti-Scale Media is great for reducing and preventing scale build up in in a wide range of applications including: Pre-filter for RO EquipmentDomestic Water SystemsRefrigeration Equipment Coffee MachinesWater Purifying Equipment Ice MachinesAir Conditioning Equipment Water WellsVending Machines Food Service Equipment Normally a concentration of Siliphos at threshold levels of 0.5-5.0 ppm Polyphosphate will inhibit scale and corrosion. Use 5.0 to 10.0 pounds of beads per filter. The filter should be placed in an area where there is good water flow and should only be used with cold water. Refillable Cartridge 10" This product comes with a 10" Standard Refillable Cartridge for your Iron/Manganese Filter Media. Iron/Manganese Sand removes dissolved iron, reducing rust stains in sinks, tubs, and toilets. About our Siliphos Anti-Scale Filter Media Hard water is common to 85% of the north American cities and affects both those with city water and well water Hard water is caused by the presence of calcium and magnesium minerals in the water. When it is not treated, these natural minerals can be "sticky" as they encounter stress in the house, such as temperature change, pressure, or turbulence. This sticky mineral will form hard water stains on counter tops and shower walls, and will affect the way the soap lathers. Hard water problems are even worse in areas where you can't see them. Hard water build-up will form inside of pipes, on the heating coil or element in your water heater, inside shower heads and faucets, and in other areas that can't be seen or cleaned. These deposits will start to clog faucets, filters, and pipes. Water heaters and other water-using appliances will exhibit hard water problems such as a reduction in water flow, and will require repair or replacement. Hard water scale build-up will also increase energy usage in appliances, can cause them to fail prematurely. About our Siliphos Anti-Scale Filter Media Hard water is common to 85% of the north American cities and affects both those with city water and well water Hard water is caused by the presence of calcium and magnesium minerals in the water. When it is not treated, these natural minerals can be "sticky" as they encounter stress in the house, such as temperature change, pressure, or turbulence. This sticky mineral will form hard water stains on counter tops and shower walls, and will affect the way the soap lathers. Hard water problems are even worse in areas where you can't see them. Hard water build-up will form inside of pipes, on the heating coil or element in your water heater, inside shower heads and faucets, and in other areas that can't be seen or cleaned. These deposits will start to clog faucets, filters, and pipes. Water heaters and other water-using appliances will exhibit hard water problems such as a reduction in water flow, and will require repair or replacement. Hard water scale build-up will also increase energy usage in appliances, can cause them to fail prematurely.