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Hot tub supplies: how to choose, with sources
Our core job is matching your spa to the right filter cartridge. These guides cover the supplies around it. Each one explains what to look for first, cites the manufacturer or public-health guidance behind any number or safety statement, and only then lists a few products.
Holiday 2026
Spare filters, chemicals and cover care before guests arrive, with the published Black Friday, Cyber Monday and carrier dates. No discount is listed here.
- Black Friday hot tub filters and spa care (2026 dates)
Black Friday is Friday, November 27, 2026, and Cyber Monday is Monday, November 30. What to have on hand: a spare cartridge, chemicals and cover care, plus the USPS and UPS send-by dates. No prices and no discount figures.
- Gifts for hot tub owners 2026
Gifts that match a real spa: the correct replacement cartridge, test strips, a filter cleaner, and cover care. 2026 shipping dates from USPS and UPS. No prices and no invented bundles.
- Winter spa care: cover, filter and water
What Hot Spring, CDC and CPSC say about a hot tub in cold weather: snow on the cover, a locked safety cover, filter cleaning when use goes up, and chemical storage. No universal winterizing recipe.
Test and balance your water
Start here. Know your numbers before you add anything: strips or kits, then pH, alkalinity and calcium in the order your spa maker gives.
- Best hot tub test strips and test kits: how to choose
What test strips and kits measure, which readings matter for chlorine vs bromine tubs, and a short list of strips and DPD kits to consider.
- How to balance hot tub pH and alkalinity (in the right order)
Total alkalinity first, then calcium, then pH: the order Hot Spring’s manual gives, target ranges, how to add chemicals, and pH/alkalinity products to consider.
Sanitize and shock
Bromine, chlorine and mineral systems compared against CDC and Hot Spring guidance, and how shocking works.
- Hot tub sanitizer: bromine vs chlorine vs mineral systems
How the main hot tub sanitizers differ, what CDC and Hot Spring say about residual levels and stabilized chlorine, and a short list of tablets, floaters and granules.
- Hot tub shock: chlorine vs non-chlorine (and when to use it)
What “shocking” a hot tub means, what Hot Spring and CDC say about superchlorinating, and non-chlorine oxidizers to consider.
Fix water problems
Foam, cloudy water, stains and scale, with the causes Hot Spring lists before you reach for a bottle.
- Hot tub foam, cloudy water and jet cleaners: what to try
Probable causes Hot Spring lists for cloudy water and other problems, when defoamers, clarifiers, enzymes and plumbing flushes are used, and a short list of products.
- Hot tub stain, scale and metal control: causes and products
What causes scale and metal staining according to Hot Spring’s troubleshooting guide, how stain-and-scale products are used, and options to consider.
Filter care
Cleaners, tools and the cleaning routine that Unicel and Pleatco publish. Then find your replacement cartridge by part number.
- Best hot tub filter cleaners: soaks, sprays and tools
Soak vs spray vs DIY, what Unicel and Pleatco say about degreasing, and a short list of spa filter cleaners and cleaning tools.
- How to clean a hot tub filter (step by step)
The cartridge cleaning procedure Unicel and Pleatco publish: hose rinse, degreasing soak, optional acid soak, and rinse, plus what to avoid.
- How often should you clean a hot tub filter?
Rinse and deep-clean schedules for spa filter cartridges according to Hot Spring, Jacuzzi, Sundance, Pleatco and Unicel.
Covers, steps, tools and parts
Cover lifters and cover care, steps and handrails, skimmers and vacuums, and how to match a replacement pillow.
- Hot tub cover lifters and cover care: what to know before you buy
How cover lifters differ by clearance, Hot Spring’s cover cleaning and handling rules, wind and snow cautions, and cover lifter options.
- Hot tub steps and handrails: sizing and safe-entry checklist
How to choose hot tub steps and a handrail by height and footprint, plus the CPSC safety tips that apply around any spa.
- Hot tub cleaning tools: skimmers, vacuums and scum absorbers
What hand skimmers, mini spa vacuums and scum absorbers are for, with CDC guidance on scrubbing and draining, and a short list of tools.
- Replacement hot tub headrests and pillows: how to get the right fit
Why spa pillows are model-specific, how to measure and identify yours, and search links for pillows and headrests by brand.
Safety
Chemical storage and handling from CDC, plus the CPSC safety tips for spas.
- Hot tub chemical safety and storage: what CDC says
CDC’s pool-chemical storage and handling rules applied to a home hot tub: temperature, moisture, separation, labels, plus never-mix reminders.
The cartridge itself
Supplies sit around the filter. The cartridge is a separate lookup. Fitment guides cover Hot Spring sizes, Caldera bottoms, Bullfrog, Sundance and Jacuzzi look-alikes, Master Spas Eco-Pur and Intex and Bestway. Start from a part number on the homepage, or from the size lookup. Every guide is indexed on the guides hub.