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Clarathon: Worlds finest hot tub spa filters
Clarathon Premium Ultra Filters
Hot Tub Spa & Pool Filters
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  • World's largest stock of Long-Life Cartridges
  • Replacements for Unicel, Pleatco, Filbur, Aladdin
  • Save even more with Quantity Discounts!
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Filters Listed in Ascending Order by Width, then Length

Master Spas
 
 
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FC0125
ThreadedPrice: $16.95
Width: 4-5/8" Whats This?Info
Length: 6-3/4" Whats This?Info
Top: Handle
Bottom: 1-1/2" Fine Thread Whats This?Info
Surface Area: 25 SF Whats This?Info
Premium replacement for:
Unicel: 4CH-20 Whats This?Info
Pleatco: PHC25P4 Whats This?Info
Filbur: FC-0125 Whats This?Info
Aladdin: 12004
Other: FC9913, PSG25P4
Quantity Discounts:
Buy 2-3: $16.05 ea.
Buy 4-5: $15.20 ea.
Buy 6 +: $14.53 ea.

Buy Now

 
FC2385
Price: $18.95
Width: 4-15/16" Whats This?Info
Length: 9-1/4" Whats This?Info
Top: 2-1/8" Open Whats This?Info
Bottom: 2-1/8" Open Whats This?Info
Surface Area: 35 SF Whats This?Info
Premium replacement for:
Unicel: C-4335 Whats This?Info
Pleatco: PRB35-IN Whats This?Info
Filbur: FC-2385 Whats This?Info
Aladdin: 13501
Other: 817-3501, FL1008
Quantity Discounts:
Buy 2-3: $17.95 ea.
Buy 4-5: $17.00 ea.
Buy 6 +: $16.24 ea.

Buy Now
Notes: Also available in Antimicrobial version: FC2385M (below).

 
FC2385M
Antimicrobial Whats This?InfoPrice: $23.95
Width: 4-15/16" Whats This?Info
Length: 9-1/4" Whats This?Info
Top: 2-1/8" Open Whats This?Info
Bottom: 2-1/8" Open Whats This?Info
Surface Area: 35 SF Whats This?Info
Premium replacement for:
Pleatco: PRB35-IN-M Whats This?Info
Filbur: FC-2385M Whats This?Info
Quantity Discounts:
Buy 2-3: $22.68 ea.
Buy 4-5: $21.48 ea.
Buy 6 +: $20.53 ea.

Buy Now

 
FC2375
Price: $14.95
Width: 4-15/16" Whats This?Info
Length: 13-5/16" Whats This?Info
Top: 2-1/8" Open Whats This?Info
Bottom: 2-1/8" Open Whats This?Info
Surface Area: 25 SF Whats This?Info
Premium replacement for:
Unicel: C-4326 Whats This?Info
Pleatco: PRB25-IN Whats This?Info
Filbur: FC-2375 Whats This?Info
Other: 817-2500, 33521, FL1001
Quantity Discounts:
Buy 2-3: $14.16 ea.
Buy 4-5: $13.41 ea.
Buy 6 +: $12.81 ea.

Buy Now
Notes: Also available in Antimicrobial version: FC2375M (below).

 
FC2375M
Antimicrobial Whats This?InfoPrice: $18.95
Width: 4-15/16" Whats This?Info
Length: 13-5/16" Whats This?Info
Top: 2-1/8" Open Whats This?Info
Bottom: 2-1/8" Open Whats This?Info
Surface Area: 25 SF Whats This?Info
Premium replacement for:
Pleatco: PRB25-IN-M Whats This?Info
Filbur: FC-2375M Whats This?Info
Quantity Discounts:
Buy 2-3: $17.95 ea.
Buy 4-5: $17.00 ea.
Buy 6 +: $16.24 ea.

Buy Now

 
FC0359
ThreadedPrice: $23.95
Width: 6" Whats This?Info
Length: 8-1/4" Whats This?Info
Top: Handle
Bottom: 1-1/2" Coarse Thread Whats This?Info
Surface Area: 50 SF Whats This?Info
Premium replacement for:
Unicel: 6CH-940 Whats This?Info
Pleatco: PWW50P3 Whats This?Info
Filbur: FC-0359 Whats This?Info
Aladdin: 14510
Other: 817-0050, X265010, FL1007
Quantity Discounts:
Buy 2-3: $22.68 ea.
Buy 4-5: $21.48 ea.
Buy 6 +: $20.53 ea.

Buy Now
Models: H2X Swim Spa, Crosstrainer, Crosstrainer 2

 
FC0330
ThreadedPrice: $29.95
Width: 6" Whats This?Info
Length: 12-1/4" Whats This?Info
Top: Handle
Bottom: 1-1/2" Fine Thread Whats This?Info
Surface Area: 45 SF Whats This?Info
Premium replacement for:
Unicel: 6CH-45 Whats This?Info
Pleatco: PTL45W-P-4 Whats This?Info
Filbur: FC-0330 Whats This?Info
Aladdin: 14506
Quantity Discounts:
Buy 2-3: $28.36 ea.
Buy 4-5: $26.87 ea.
Buy 6 +: $25.67 ea.

Buy Now

 
FC0418
ThreadedPrice: $24.95
Width: 7" Whats This?Info
Length: 7-1/4" Whats This?Info
Top: Handle
Bottom: 2" Fine Thread Whats This?Info
Surface Area: 30 SF Whats This?Info
Premium replacement for:
Pleatco: PMA40-F2M Whats This?Info
Filbur: FC-0418 Whats This?Info
Other: X268080
Quantity Discounts:
Buy 2-3: $23.63 ea.
Buy 4-5: $22.38 ea.
Buy 6 +: $21.38 ea.

Buy Now
Notes: Conventional 1-piece substitute for Eco Pur system

 
FC1003
Price: $16.95
Width: 7" Whats This?Info
Length: 7-1/4" Whats This?Info
Top: 4-1/16" Wide Mouth
Bottom: 4-1/16" Wide Mouth
Surface Area: 30 SF Whats This?Info
Premium replacement for:
Unicel: C-7330 Whats This?Info
Pleatco: PMA-30-2002-R Whats This?Info
Filbur: FC-1003 Whats This?Info
Quantity Discounts:
Buy 2-3: $16.05 ea.
Buy 4-5: $15.20 ea.
Buy 6 +: $14.53 ea.

Buy Now
Notes: Eco Pur System outer filter (old style)

 
FC1007
Price: $24.95
Width: 8" Whats This?Info
Length: 7-3/8" Whats This?Info
Top: 4-1/16" Open Whats This?Info
Bottom: 4-1/16" Open Whats This?Info
Surface Area: 40 SF Whats This?Info
Premium replacement for:
Unicel: C-8341 Whats This?Info
Pleatco: PMA45-2004-R Whats This?Info
Filbur: FC-1007 Whats This?Info
Quantity Discounts:
Buy 2-3: $23.63 ea.
Buy 4-5: $22.38 ea.
Buy 6 +: $21.38 ea.

Buy Now
Notes: Eco Pur System outer filter (2002+)

 
FC0515
ThreadedPrice: $45.95
Width: 8" Whats This?Info
Length: 9-1/4" Whats This?Info
Top: Handle
Bottom: 2" Fine Thread Whats This?Info
Surface Area: 60 SF Whats This?Info
Premium replacement for:
Unicel: 8CH-66 Whats This?Info
Pleatco: PMA60-F2M Whats This?Info
Filbur: FC-0515 Whats This?Info
Aladdin: 16010
Quantity Discounts:
Buy 2-3: $43.51 ea.
Buy 4-5: $41.22 ea.
Buy 6 +: $39.38 ea.

Buy Now

 
FC1004
Price: $24.95
Width: 8-1/2" Whats This?Info
Length: 17" Whats This?Info
Top: Flat
Bottom: Flat
Surface Area: 50 SF Whats This?Info
Premium replacement for:
Pleatco: PMA50-2002-F Whats This?Info
Filbur: FC-1004 Whats This?Info
Other: X298600
Quantity Discounts:
Buy 2-3: $23.63 ea.
Buy 4-5: $22.38 ea.
Buy 6 +: $21.38 ea.

Buy Now
Notes: Flat rectangular top filter, 2 1/4" thick.

 
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