Need chemistry help before choosing supplies? Start with our fill and balance guide and use filter cleaning instructions. Looking for pool maintenance products? Browse pool supplies.
Hot Tub Supplies
Supplies designed specifically for hot tub care, including filters, water treatment, cleaning products, and routine maintenance essentials.
Replacing a filter?
Most spa filters are matched by size, position, and cartridge style—not by spa brand. Measuring your existing filter is the best way to confirm fit.
Hot Tub Filters
Most customers match by size first, then confirm by filter type and brand.
By Size
By Function
By Brand

100 sq ft Cartridge Filter – D1 AquaFit Pro / Play / Plus (2013+)
100 sq ft · Cartridge filter
Replaces 3000-13
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125 sq ft Cartridge Filter – Sundance
125 sq ft · Cartridge filter
18" L × 8.5" Ø
Replaces SUN6540-490
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125 sq ft Complete Cartridge Filter – Sundance
125 sq ft · Cartridge filter
19" L × 8.5" Ø
Replaces UNI-60-5723
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30 sq ft Cartridge Filter – Hot Spring
30 sq ft · Cartridge filter
Replaces FC-3915
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35 sq ft Cartridge Filter – FC-2385 / C-4335
35 sq ft · Cartridge filter
9.25" L × 4.9375" Ø
Replaces FC-2385
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35 sq ft Circulation Pump Cartridge Filter – PAS35 / 06-0014-12
35 sq ft · Cartridge filter
Circulation pump
8.25" L × 4.5" Ø
Replaces PAS35
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35 sq ft Skimmer Cartridge Filter – D1 AquaFit Sport
35 sq ft · Cartridge filter
Skimmer
Replaces 3000-19
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36 sq ft Cartridge Filter – Bullfrog (2013+)
36 sq ft · Cartridge filter
8" L × 7" Ø
Replaces 10-2870
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45 sq ft Cartridge Filter – FC-2401 / 5CH-45
45 sq ft · Cartridge filter
10" L × 5.3125" Ø
Replaces FC-2401
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50 sq ft Cartridge Filter – Bullfrog (2009–2012)
50 sq ft · Cartridge filter
9" L × 7" Ø
Replaces 10-2785
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50 sq ft Cartridge Filter – Clearwater Spas (2024+)
50 sq ft · Cartridge filter
Replaces 890-700-030
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50 sq ft Cartridge Filter – FC-2390 / C-4950
50 sq ft · Cartridge filter
10.5" L × 5" Ø
Replaces FC-2390
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50 sq ft Cartridge Filter – Jacuzzi
50 sq ft · Cartridge filter
Replaces PWW-50
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50 sq ft Cartridge Filter – Marquis
50 sq ft · Cartridge filter
Replaces FC-0195
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50 sq ft Lower Cartridge Filter – D1 AquaFit Sport
50 sq ft · Cartridge filter
Lower
Replaces 3000-23
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50 sq ft Main Pump Cartridge Filter – PAS50SV / FC-0311
50 sq ft · Cartridge filter
Main pump
13.3" L × 5" Ø
Replaces PAS50SV
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50 sq ft Upper Cartridge Filter – D1 AquaFit Sport
50 sq ft · Cartridge filter
Upper
Replaces 3000-22
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65 sq ft Cartridge Filter – Hot Spring / Tiger River
65 sq ft · Cartridge filter
Replaces AK-7007
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75 sq ft Cartridge Filter – D1 (2000–Current)
75 sq ft · Cartridge filter
Replaces 01561-00-A
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80 sq ft Cartridge Filter – Sundance
80 sq ft · Cartridge filter
14" L × 8.4375" Ø
Replaces FC-2810
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Sundance MicroClean Disposable Filter
Disposable filter
5" L × 8" Ø
Replaces FC-2812
View details →Choosing the Right Hot Tub Supplies
Selecting the right supplies for your hot tub is essential to keeping it in top condition. Whether you need replacement filters, water care chemicals, or cleaning products, compatibility is key to ensuring your system operates effectively.
Hot tub filters need to be matched by their size, type, and position to work efficiently. If you're unsure, measuring your old filter or consulting with our experts will ensure that you get the right fit for your hot tub.
In addition to filters, maintaining water quality is crucial. Our selection of chemicals and treatment products are designed to keep your hot tub water clean, balanced, and safe for use.