Spa Filter Cartridges

Spa Filter Cartridges for Hot Tubs, Spas, and Clean Water Maintenance

Keep your spa water clear, comfortable, and easier to maintain with replacement spa filter cartridges from Aqua Terra Backyard. Spa filter cartridges help capture dirt, hair, oils, debris, and fine particles as water moves through the filtration system. Replacing a worn or clogged cartridge can improve water flow, support better circulation, reduce strain on the spa pump, and help your sanitizer work more effectively.

We carry pool and spa filtration products from trusted brands such as Filbur Manufacturing, Oncore Filters, Unicel, Pleatco, and other leading filter manufacturers. This Spa Filter Cartridges collection focuses on replacement cartridges for compatible hot tubs and spa filtration systems, while our broader filtration categories include additional cartridge filters, grids, filter parts, and maintenance products. You can also browse related categories like Filter Cartridges, Filter Parts, Spa Equipment, Spa Pumps, Pool & Spa Parts, Pool Filters, and Pool & Spa Maintenance.

The right spa filter cartridge depends on the exact size and connection style of your existing filter. Before ordering, compare the cartridge length, outside diameter, top and bottom end cap style, thread type, center hole size, square-foot rating, and any part numbers printed on the old cartridge or filter housing. A cartridge can look similar and still be the wrong fit. If you are not sure which spa filter cartridge you need, contact Aqua Terra Backyard with photos of the old cartridge, the spa brand if known, and any numbers printed on the filter. We can help you narrow down the correct replacement before you buy.