Best Pool Filter Cartridges Under $50 (2026)
We ranked cartridges under $50 by value score using compatibility, pack size, user ratings, filtration features, and added conveniences like dispensers or handles
This roundup covers pool and spa filter cartridges priced under $50, evaluated for value, compatibility, and filtration performance. Picks were chosen by comparing filter type, pack size, manufacturer compatibility (Unicel, Watkins, Intex/Lay‑Z‑Spa), user ratings, and features like built‑in dispensers
Top Picks
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1
Intex PureSpa 12-pack cartridge filter set (4.25 in) for PureSpa models
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
POOLPURE Type VI spa filter for Lay-Z-Spa 90352E 58323 90427E
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
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
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
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
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
Pool Filter VI for Saluspa Spa Filter Pump Replacement Cartridge Type VI
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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8
Type VI hot tub filter cartridge for Lay-Z-Spa, Coleman SaluSpa
Filter cartridge compatible with Type VI spa and hot tub systems. Easy to install with good value for money, though some users report durability issues
- compatible with Lay-Z-Spa and SaluSpa
- easy installation
- value for money
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9
Type VI spa filter replacement cartridge for hot tubs
Replacement Type VI spa filter cartridge for inflatable and hot tub pumps. Features a densely trilobal fabric for filtration and a dirt-locking design. Customers note fit and value, with concerns about melt resistance
- Type VI filter for spas and inflatable tubs
- high-efficiency filtration fabric
- wide compatibility with spa pumps
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10
FROG in-Line Mineral Cartridge for Hot Tubs
Mineral cartridge for hot tubs that works with SmartChlor to deliver sanitizing power and create clear water. Easy to install and maintain water balance, per user feedback
- time-released sanitizing minerals
- pre-filled cartridges
- works with SmartChlor systems