How to Maintain a Hot Tub: The 2026 Owner's Playbook

Ask ten spa dealers how to maintain a hot tub and you'll get ten different answers, most of them designed to sell you chemicals. As techs who run 30+ service calls a week, we can tell you exactly which maintenance actually keeps a spa alive — and which parts of the "official" routine you can ignore without consequence.

Here's the honest 2026 playbook: weekly, monthly, quarterly, and yearly.

Weekly (5 minutes, non-negotiable)

1. Test the water twice a week. Use test strips or a drop kit. Targets:

• pH: 7.2 – 7.8 (7.4 – 7.6 is the sweet spot)
• Total alkalinity: 80 – 120 ppm
• Sanitizer: chlorine 1 – 3 ppm or bromine 3 – 5 ppm
• Calcium hardness: 150 – 250 ppm

Adjust in this order: alkalinity first, then pH, then sanitizer. Never dose more than one variable at a time.

2. Shock after heavy use. After a party or a soak with 3+ people, add a non-chlorine oxidizing shock (MPS) at the label rate. This burns off body oils and sweat before they turn into biofilm.

3. Wipe the waterline. A microfiber cloth around the shell at water level, once a week, prevents the scummy ring that becomes near-permanent if ignored.

Monthly (15 minutes)

1. Deep-clean the filter. Spraying the pleats with a hose weekly is fine. Once a month, do a proper soak in filter cleaner overnight, rinse, and reinstall. A blocked filter is the #1 root cause of "no heat" and "weak jets" complaints.

2. Test the GFCI. Press the TEST button on the spa disconnect. The tub should shut off immediately. Press RESET to restore. This is a life-safety device — never skip.

3. Inspect the cover. Look for waterlogging (a heavy, cold cover), splits in the vinyl, and torn hinge stitching. A waterlogged cover doubles your energy bill and needs replacement.

4. Rotate every jet full-open, then adjust back. Keeps the internal bearings free and stops calcium from locking them in place.

Quarterly (2 hours + refill time)

1. Drain, purge, and refill. This is the single most important maintenance task, and most owners skip it.

• Before draining, run a plumbing-line purge (Ahh-Some, Oh Yuk, or similar) at the label rate with the jets on high for 20 minutes. This is what removes biofilm from the internal plumbing — biofilm is what causes cloudy water no matter how much sanitizer you add.
• Drain fully.
• Wipe the shell with a non-abrasive cleaner.
• Clean the filter or replace it.
• Refill (through the filter housing, not directly into the shell — this pre-fills the plumbing and prevents airlock).
• Balance water in the order above.

2. Inspect the equipment bay. Open the access panel and look for: dripping water, corrosion on terminals, mouse nests (real problem in fall), and cracked hoses. A five-minute visual catches problems six months early.

3. Check the pillows and headrests. Sanitizer degrades foam — replace pillows every 2 years to keep them looking good.

Yearly (professional service)

Once a year, have a tech do:

• Full equipment diagnostic — element resistance, pump amp draw, capacitor test, pack fault history
• Heater manifold flush — critical in hard-water regions
• Bonding continuity check — the metal grounding that protects you from shock hazards
• Cover lifter and hinge inspection — cheap parts that get expensive when they fail
• Chemistry consultation — your water source changes; your dosing should too

Yearly service runs $180–$320 in most markets and pays for itself the first time it catches a $60 capacitor before it kills a $500 pump.

What you can safely skip

Real talk on the maintenance industry:

• Weekly "enhancer" and "clarifier" products — a properly balanced tub doesn't need them. If you're always cloudy, purge and refill.
• Automatic feeders for cheap trichlor tabs — trichlor tanks your pH and corrodes heaters. Use dichlor granules or bromine tabs instead.
• Overshocking every week — shocking works best after heavy use, not on a schedule.
• Metal sequestrant if you're on city water — usually only needed on well water.
• Fancy "spa fragrance" products — they gum up filters and add nothing.

Seasonal adjustments

Cold climates: Never let the tub sit unpowered in freezing weather. If you're going away, either keep it heated to 100 °F+ or fully winterize (drain, blow out plumbing, add pink RV antifreeze to traps).

Hot climates: Sanitizer burns off faster in high temps and full sun. Test three times a week in summer and consider a floating cover to reduce UV exposure.

Coastal areas: Rinse the cabinet with fresh water monthly to prevent salt corrosion on GFCI lugs and heater terminals.

The one habit that matters most

If you do only one thing on this whole list, do the quarterly drain, purge, and refill. Skipping it is the #1 cause of every problem we get called out for — cloudy water, no heat, weak jets, bad smell, foam, and premature equipment failure all trace back to a tub that hasn't been properly refreshed in a year.

Book a professional check-up

If you're not sure whether your tub is due for service — or if it's been more than 6 months since a proper drain-and-purge — a flat-rate maintenance visit sets everything right. Same-day windows usually available, written report on equipment condition included.