Best Blue Cartridge Pool Filters in 2026

KEEP POOL OR SPA FRESH: The S1 Cartridge Filter is sure to keep your PureSpa Jet Massage water clean and fresh

MULTI PACK: 6-pack of Intex Type S1 filter cartridges

ULTIMATE FILTRATION: Made with easy to clean, heavy duty Dacron paper for the ultimate filtration

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Unicel C-4325, C-4326, Filbur FC-2390, and Pleatco PRB50-IN and PRB68. See below for alternative filter names. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an open 2 1/8 inch (2.125") top, 2 1/8 inch (2.125") open hole bottom, 5 inch (5") diameter and 13 5/16 inch (13.3125") length. The filter material is made of USA made premium spunbond trilobal filter material for better filtration.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Unicel C-8326, Filbur FC-2780, Pleatco PSD125-2000. Alternate Filter Names below. Filters May Be Green or Blue

✅ DIMENSIONS -Length: 19", Diameter: 8-1/2", Top: 2-3/16" slip, Bottom: 2-3/4" hole (beveled edge)

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Pleatco: PSD85-2002, Unicel: C-8380, Filbur: FC-2810. Check below for alternate filter names. Filters May Be Green or Blue

✅ DIMENSIONS - Diameter: 8 1/2" Length: 14" Top: 2" SAE (Closed) Bottom: 2 1/2" tapered

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Pleatco PWK30, Filbur FC-3915, Unicel C-6430. Alternative filter names: 31489, 73178, Tri-X, 71825, 75041, 0969601, APCC7095, 13004, PKW30, APCC7095M, SD-01242, 090164824000, PWK 30, PDC510-AFS. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an open 1 15/16 inch (1.9375") top, 1 15/16 inch (1.9375") open hole bottom, 5 7/8 inch (5.875") diameter and 10 1/2 inch (10.5") length. The 30 sq. ft. of premium filter material is easier to clean, filters better and lasts longer.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for: Pleatco PGS25P4, Unicel 4CH-24, Filbur FC-0131. Check below for other alternative cartridge filter names. Filters May Be Green or Blue

✅ DIMENSIONS - Diameter: 4 5/8" Length: 9 3/4" Top: Handle Bottom: 1 1/2" MPT Threaded

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Filbur FC1001M, and replacement for Pleatco PWWCT150, Unicel C-8414, Filbur FC-1287. Used in pools/spas made by: Jandy, Waterway Plastics & other manufacturers. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an 4 inch (4") open hole top, 4 inch (4") open hole bottom, 8 15/16 inch (8.9375") diameter and 23 5/16 inch (23.3125") length. The 150 sq. ft. of premium material is easier to clean, filters better and lasts longer.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

CHLORINE and CHLORAMINE used in the municipal water system are aggressive chemicals which can cause illness, plus they eliminate your plants' essential biology.

THE BOOGIE BLUE PLUS water filter removes 99% of the Chlorine and 87% of the Chloramine, and reduces all levels of volatile compounds, toxins, heavy metals, pesticides/herbicides present in the water.

UNMATCHED BY THE COMPETITION. Designed with more dual catalytic-carbon and KDF material than its nearest competitor, giving it a 45,000 gallon output while others barely reach 10,000.

✅ Filters May Be Green or Blue ✅REPLACEMENT FILTER - Compatible with Replaces: PA112 Unicel: C-7489 Filbur: FC-1275. See below for alternate filter names. Filters May Be Green or Blue

✅DIMENSIONS - Diameter: 7" Length: 25 1/2" Top: Open Hole: 3" Bottom: Open Hole: 3"

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅REPLACEMENT FILTER - Compatible with Replaces: Unicel 5CH-35, Filbur FC-0300, Pleatco PMAX50P4. See below for alternate filter names. Filters May Be Green or Blue

✅DIMENSIONS - Length: 8-7/16" Diameter: 5-3/4" Top: Handle Bottom: 1-1/2" MPT threaded

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅REPLACEMENT FILTER - Get purer, cleaner water in your spa or hot tub with these replacement cartridge filters compatible with: Unicel C-9410, Filbur FC-0686, Pleatco PAP100-4 Filters May Be Green or Blue

✅ DIMENSIONS -Length: 23-5/8", Diameter: 10-1/16", Top opening: 6", Bottom opening: 6"

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Unicel C-4995RA, Filbur FC-2940M, Pleatco PCAL100-M Filters May Be Green or Blue

✅ DIMENSIONS - Length: 23-5/8" Diameter: 5" Top opening: 2-1/8" Bottom opening: 2-1/8"

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Pleatco PA131, Filbur FC-1227, Unicel C-7497. Alternative filter names: CX1280-XRE, CX1280-RE, Hayward Swim Clear C-5025, Hayward Swim Clear C-5030, 17-175-1338, APCC7181, 22506, FC-6435, 090164021386, SD-01064, PA131-4. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an 3 inch (3") open hole top, 3inch (3") open hole bottom, 7 inch (7") diameter and 32 3/4 inch (32.75") length. The 131 sq. ft. of premium filter material is easier to clean, filters better and lasts longer.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Unicel C-5397 Filbur FC-2972 Pleatco PLBS100 Filters May Be Green or Blue

✅ DIMENSIONS - Length: 17-3/4", Diameter: 5-5/16", Top opening: 2-1/8", Bottom opening: 2-1/8"

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible with: for Unicel c-4313, Pleatco PBW4PAIR, Filbur FC-3753 | Intex Sand N Sun Size D, Wal Mart Simple Set Type 1, Aqua Leisure Size 1. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an open 2 1/16 inch (2.0625") top, 2 1/16 inch (2.0625") open hole bottom, 4 1/4 inch (4.25") diameter and 3 3/4 inch (3.75") length. The filter material is made of USA made premium spunbond trilobal filter material for better filtration.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

Programmable filtration timer

Day cycle activated by sunlight

Night cycle activated by darkness

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Pleatco PA126, Unicel C-7495, Filbur FC-1296. Alternate filter names: CX1260-RE, C-126RE, C5020, Hayward Super-Star-Clear C5000, Hayward SwimClear C5020, 17-175-1348, APCC7181, 22506. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has a 3 inch (3") open hole top, 3 inch (3") open hole bottom, 7 inch (7") diameter and 32 7/8inch (32.875") length. The 126 sq. ft. of premium filter material is easier to clean, filters better and lasts longer.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.

💦Longer Lasting Clean: The body uses premium blue filter paper, which is easier to keep the water clean than common filter paper. Enjoy clean bathing and fun with your family and friends.

💦Compatible Model: The replacement cartridge filters are compatible with all RELXTIME spa pools. Outer diameter 100mm(3.9inch), inner diameter 60mm(2.4inch), height 79mm(3.1inch). and are conveniently sold in 6 packs. Our spa filters are the best partner for your hot tubs.

💦Maintain and Reused: It is recommended to change the spa filter regularly to maintain filtration efficiency, and replace it every 2-3 days during heavy usage. To ensure a constant replacement pool filter performance, clean your spa filter cartridge replacement before and after use. The filter can be used repeatedly after proper cleaning and maintenance.

✅ Filters May Be Green or Blue ✅ REPLACEMENT FILTER - Get purer, cleaner water in your pool or spa with these replacement cartridge filters compatible for Pleatco PRB50IN, Unicel C-4950, Filbur FC-2390. Filters May Be Green or Blue

✅ DIMENSIONS - This replacement pool filter cartridge has an open 2 1/8 inch (2.125") top, 2 1/8inch (2.125") open hole bottom, 4 15/16 to 5 inches diameter and 13 5/16 inch (3.3125") length. The filter material is premium spunbond trilobal filter material for better filtration.

✅ MULTI PACK SAVINGS - Choose from our value savings single, double or 4 pack filter bundle. Having multiple filters on hand can help extend the life of each and protects your pool or spa because you can keep 1 filter active while cleaning the other for zero filtration downtime.