Best Pool Filter Cartridges for Hot Tubs of 2025

POOLPURE Hot Tub Filter is a compatible spare part for various filter models, including Unicel C-4326, Filbur FC-2375, and Pleatco PRB25-IN. It is tested and certified by IAPMO against NSF/ANSI 50, ensuring the delivery of safe and purified water to your hot tub. Its Trilobal Fabric Structure filter material makes it easy to release impurities when cleaning the filter, and the "Dirt-Locking" technology traps more contaminants than regular fabric. With powerful filtration performance, this filter efficiently removes hair, leaves, dust, sediment, sand, and more. Its unique Trilobal Filtration Fabric Structure allows for the capture of a large volume of contaminants, and it lasts for 1-2 years when properly maintained. Enjoy your unique spa time with POOLPURE Hot Tub Filter.

Replace your SaluSpa hot tub's filter with this 2-pack of premium type VI filter cartridges. These filters are easy to clean and long-lasting, ensuring clean and pristine spa water. The cartridges come shrink-wrapped with an insert card and are compatible with all SaluSpa inflatable hot tub and spa models. The dimensions of each cartridge are 4.2 x 4.2 x 3.1 inches.

SUNSET FILTERS Type VI Spa and Hot Tub Filter Replacement Cartridge is perfect for Coleman SaluSpa filter, Lay-Z-Spa, Bestway, Intex and other inflatable hot tub filters. The filter is made of high-quality Dacron fabric which collects hair, leaves, dust, sediment, sand, and other debris effectively. It is easy to clean and replace. You should change the filter every 2-3 weeks during heavy usage to maintain filtration efficiency and keep the water fresh and clean.

The Pool Health Type VI Filter offers excellent compatibility with popular hot tub brands like Lay-Z-Spa and Coleman SaluSpa. Its advanced meltblown technology ensures superior filtration, effectively trapping debris without the need for harsh chemicals, which helps maintain a cleaner spa environment. With dimensions of 4.1” x 3.1”, these filters fit perfectly and come in a convenient pack of six. You’ll also appreciate that these filters last longer than standard options, eliminating the hassle of frequent cleaning. Plus, they are recyclable, making them a more sustainable choice for your pool maintenance.

POOLPURE Spa Filter is a compatible spare part for PRB50-IN, Unicel C-4950, and other models. It is tested and certified by IAPMO against NSF/ANSI 50 for safe material. The trilobal filtration fabric has a greater effective surface area, which can increase back pressure throughout your entire filtration system and provide you with clean, fresh, and clear water. The filter fabric with a precision of 50 microns can remove hair, leaves, dust, sediment, sand, and other fine particles. The uniformity and high-performance trilobal fabric make it easier to capture and release stains, so it's easy for you to wash the filter after use. It is recommended that you clean the cartridges every month depending on usage to maximize your pool's performance.

The Intex 29011E Type S1 PureSpa Filter Cartridges come in a pack of six and are designed to keep your PureSpa Jet Massage water clean and fresh. The filter cartridges are made with heavy-duty Dacron paper for the ultimate filtration and can be cleaned and reused for maximum efficiency. These filter cartridges work with all Intex PureSpa models, including 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E, and 28453E.

The SORSWEET Hot Tub Filter is designed for easy compatibility with various inflatable hot tubs, including Coleman SaluSpa and Lay-Z-Spa models. Measuring 4.1” x 3.1”, these filters ensure a perfect fit, helping you maintain clean and clear spa water. The durable design allows for effortless cleaning, so you can reuse them multiple times, saving you time and money. With high filtration performance, these cartridges effectively capture dirt, hair, and other debris, ensuring a pleasant and enjoyable spa experience. Plus, you can have peace of mind with a two-year warranty and responsive customer service.

The Pool Health Group Filter is designed to fit all Intex PureSpa models, ensuring a perfect match for your spa or hot tub. Its meltblown technology offers superior filtration compared to standard options, keeping debris locked in and helping to maintain a cleaner pool without relying on chemicals. You’ll appreciate the convenience of not having to clean the filter regularly, as this type lasts longer than traditional pleated filters. Plus, it’s 100% American made, adding a quality assurance to your purchase.

POOLPURE Spa Filter is a high-quality hot tub filter compatible with various models, including PRB50-IN, Unicel C-4950, Aladdin 15002, and more. The filter is made of trilobal filtration fabric with a precision of 50 microns, which can remove hair, leaves, dust, sediment, sand, and other fine particles. It has a powerful dirt holding capacity with a greater effective surface area, which can increase back pressure throughout your entire filtration system and provide you with clean, fresh, and clear water. The filter is easy to clean due to its uniformity and high-performance trilobal fabric, making it easier to capture and release stains. It is recommended that you clean the cartridges every month depending on usage to maximize your pool's performance.

The Unicel Pool Filter is designed to keep your hot tub water crystal clear. With its 50 square feet of filter media, it effectively captures debris as small as 20 microns, ensuring a cleaner spa experience. The cartridge features sharp pleat folds that enhance water flow and reduce pressure loss, making it efficient in collecting more dirt. Made from durable polyester material, it offers excellent resistance to chemicals while maintaining great dirt-holding capacity. The easy-to-remove end cap design simplifies cartridge replacement, providing you with a hassle-free maintenance process.