Filter cartridge technology is the main type of machinery that is used for cleaning most machines where water would flow. If you own a hot tub, then you would need the best hot tub filter for it, so you can ensure that there will be no debris or any other substance that contaminates the water. Top 7 Replacement Hot Tub Filter Cartridge Products 1.  Pleatco PRB50-IN Spa Pool Filter Pros: Cons: 2.  Intex Type S1 Filter Cartridge for PureSpa Pros: Cons: 3.  Filbur FC-0359 Antimicrobial Replacement Filter Cartridge Pros: Cons: 4.  Tier1 Watkins 31489 Replacement Filter Cartridge Pros: Cons: 5.  Unicel Replacement Filter Cartridge … [Read more...]