Best Pool Filter Cartridges Under $100 (2026)
We ranked cartridges by compatibility breadth, filtration area or pleat count, build features (handles/dispensers), customer value score, and price under $100
The Verdict
- Best Overall: Intex PureSpa 12-pack cartridge filter set (4.25 in) for PureSpa models — Best for spa owners wanting an economical multi-pack: a 12-pack aimed at routine PureSpa cartridge replacement
- Best Value: POOLPURE Type VI spa filter for Lay-Z-Spa 90352E 58323 90427E — Best for Lay-Z-Spa users seeking a direct Type VI replacement that emphasizes fit for inflatable spas
Top Picks
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1
Best Overall Intex PureSpa 12-pack cartridge filter set (4.25 in) for PureSpa models
Best for spa owners wanting an economical multi-pack: a 12-pack aimed at routine PureSpa cartridge replacement
12-pack cartridge filter set for PureSpa water filtration. Maintains clear water with heavy-duty Dacron paper. Fits various PureSpa models; consumers note good value and fit, with some length differences compared to original C cartridge
- 12-pack filtration set
- heavy-duty Dacron paper
- fits various PureSpa models
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2
Best Value POOLPURE Type VI spa filter for Lay-Z-Spa 90352E 58323 90427E
Best for Lay-Z-Spa users seeking a direct Type VI replacement that emphasizes fit for inflatable spas
Replaceable spa filter cartridge compatible with Type VI and Lay-Z-Spa inflatables. Features Dirt-Locking filtration for capturing more contaminants and easy cleaning. Customers note easy fit, durability, and cleaner water between cleanings
- Compatible with multiple spa brands
- Enhanced filtration with Dirt-Locking
- Easy to clean and install
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3
POOLPURE Spa Filter 65 sq ft replacement
Best for higher surface area needs with a 65 sq ft replacement design suited to longer runs between cleanings
POOLPURE spa filter with 65 sq ft filtration area enhances water clarity. Engineered for compatibility with Watkins 31114; aims to deliver crystal-clear water. Customer notes it fits well and performs like the original
- 65 sq ft filtration area
- NSF/ANSI 50 certified
- designed to fit Watkins 31114
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4
FC-0359 spa filter replacement for unicel 6CH-940
Best for Unicel 6CH-940 compatibility with a direct fit option for pumps requiring that cartridge spec
Spa filter replacement compatible with Unicel 6CH-940; 50 sq. ft filtration area and 1 1/2" SAE thread. Customers report good value, easy installation, and durable build
- NSF/ANSI 50 certified
- 50 sq. ft filtration area
- 1 1/2" SAE thread
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5
POOLPURE 6CH-940RP Removable Handle Spa Filter
Best for easy handling and dosing with a removable handle and built-in chlorine-dispense convenience
Removable-handle spa filter with built-in chlorine/bromine dispenser for precise dosing and clear water. Customers note easy installation and cleaning, with good value
- built-in chemical dispenser
- removable handle for dosing
- large filtration area 50 sq ft
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6
Intex Easy Set Replacement Filter Cartridge Type A (8 Pack) 29000E
multi-pack for standard pools that need frequent Type A cartridge swaps in Dacron media
Replacement filter cartridge for Intex Easy Set pools; helps keep water clear. Customers note good value and effective filtration, with easy cleaning and replacement
- fits Intex 59900 cartridges
- Dacron construction
- bright value for money
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7
Intex Type S1 24-pack spa filter cartridges
Best for frequent spa maintenance with a large-count S1 pack that reduces replacement frequency
Pack of 24 genuine Intex Type S1 filter cartridges for PureSpa models. Designed for easy cleaning and effective filtration. Users note good value and fit, with mixed longevity reports
- 24-pack supply
- genuine Intex S1
- easy-to-clean Dacron filtration
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8
Toread Replacement Filter for Watkins 31489 30 sq ft
Best for Watkins 31489 users needing a direct 30 sq ft replacement with reliable pleated media
Replacement pool/spa filter compatible with Watkins 31489 and similar models. 30 sq ft filtration area with Trilobal filtration fabric for clean water; NSF/ANSI 50 certified material. Customer notes fit and durability
- NSF/ANSI 50 certified
- 30 sq ft filtration area
- compatible replacement model
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9
Pool Filter VI for Saluspa Spa Filter Pump Replacement Cartridge Type VI
Best budget replacement for SaluSpa and Lay-Z-Spa models specifying Type VI where affordability matters
Type VI replacement cartridge for Lay-Z Spa and SaluSpa filters. Dacron paper construction with "Dirt-Locking" technology for improved filtration of hair, leaves, dust, sediment, and sand
- Type VI replacement cartridge
- Improved contaminant capture
- Easy-to-clean, durable material
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10
POOLPURE PLF120A Pool Filter Cartridge
Best for pool owners seeking a Hayward-compatible cartridge option sized for general cartridge-filter systems
PoolPURE PLF120A filter cartridge compatible with common Hayward and Unicel models. Delivers 120 sq. ft. trilobal filtration fabric for pool cleanliness. One customer notes it cleans pools effectively and fits well
- 120 sq. ft filtration area
- Trilobal filtration fabric
- Compatible with multiple brands/models