I have the Pentair Clean and Clear Plus filter system with four filter cartridges. I've attached picture of the original Pentair filter cartridge (four part numbers on it, don't know which one to use) which was replaced by a set of Unicel C7470 cartridges. These lasted about 2 years. It's time to replace them and I need expert advice whether I should go back to Pentair cartridges or buy the after market products and if so, which brand.
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