CONVENIENT CARE A must have for the Intex Krystal Clear Cartridge Filter Pump. These filter cartridges are made from easy to clean Dacron paper for the ultimate filtration Filter pump compatibility – for best use and results, the filter cartridge B from Intex is compatible with filter pump models of the following models: 28633EG Routine use: for maximum efficiency and results for your above ground pool, it is recommended to replace the cartridges every two weeks for a clean and happy pool Hydroaeration Technology Intex patented HydroAeration technology improves overall water circulation, clarity and freshness in thousands of above ground pools SAFETY, QUALITY & VALUE Intex designs, builds and tests all of its products to the highest standards with first order assurance. Our affordable and innovative products are built to last