How often should I test cold plunge water?

Weekly is sufficient for a household vessel with a cover. Test more often after heavy use, hot weather, or a party of bathers.

How do I rinse a cold plunge filter?

Power off, remove the cartridge, and rinse from the inside outward with a garden hose until the water runs clear. Never use a pressure washer. Re-seat, close the housing, and power on.

What should the sanitizer level be?

Within the range printed on your manufacturer's test strips. Dose to the middle of the range rather than the top.

Why is there a film at the waterline?

Body oils and product from bathers who did not rinse first. Wipe it weekly and ask everyone to rinse before entering.

How long does weekly cold plunge maintenance take?

About ten minutes: a visual check, skim, test, filter rinse, listen, and cover.

Should I keep a spare filter cartridge?

Yes. Rotating two cartridges lets one dry fully between uses and means you are never without a clean one.

Cold Plunge Weekly Maintenance: A Ten-Minute Checklist

Ten minutes a week is the whole commitment. Done consistently, this routine keeps the water clear, the chiller efficient, and the interval between full water changes long. Skip it for three weeks and you will spend an afternoon catching up.

Editorial guidance · Teak & Marble Atelier Reviewed 2026-09-05 Companion video: Weekly Maintenance Guide (1 min)

Companion video — Weekly Maintenance Guide · 1 min

The routine

In order, about ten minutes
Step	What to do	Time
1. Look	Cover off. Is the water clear to the floor? Any film at the waterline? Any drips at fittings? Is the display at target?	1 min
2. Skim	Net floating debris; wipe the waterline with a soft cloth.	2 min
3. Test	Dip a strip. Sanitizer in range; pH 7.2–7.8. Adjust in small increments if needed.	1 min
4. Filter	Power off. Remove the cartridge and rinse from the inside out with a hose until it runs clear. Re-seat and close the housing. Power on.	4 min
5. Listen	Steady pump sound; no sputtering.	30 s
6. Cover	Cover on, latched. Note the readings in your log.	1 min

Notes on each step

Looking

Clarity is your earliest warning. Water that is slightly hazy but tests correctly usually means the filter is due; water that tests low on sanitizer with a film at the waterline means bathers are not rinsing first. A drip you catch at a fitting this week is a puddle you avoid next week.

Testing

Test with the water circulating and the strip read against the chart in good light. If sanitizer is low, dose to the middle of the range, not the top. If pH is off, adjust and re-test after an hour; pH moves slowly and overcorrection is the usual mistake.

Rinsing the filter

Rinse from the inside outward so debris leaves the pleats rather than being driven deeper. Do not use a pressure washer; it tears the media. If a rinse no longer restores flow or the cartridge stays grey, replace it. Some owners keep two cartridges and rotate, letting one dry fully between uses.

Every other week

Vacuum the floorA handheld spa vacuum removes the fine sediment a net misses.
Check the coverRinse it, check the straps and latches, and let it dry before it goes back on if it has been sitting wet.
Check clearanceLeaves, grass clippings, and stored items migrate toward chillers. Restore the clearance in your manual.

Monthly and seasonal tasks — coil cleaning, hose inspection, calibration — are in The Maintenance Protocol.

Prefer a printed checklist by the tub?

Ask our concierge for the one-page maintenance card for your model. It lists the weekly routine, the test ranges, and the filter part number so nothing depends on memory.

Speak with our concierge · View the cold plunge tubs collection

Common questions

How often should I test cold plunge water?: Weekly is sufficient for a household vessel with a cover. Test more often after heavy use, hot weather, or a party of bathers.
How do I rinse a cold plunge filter?: Power off, remove the cartridge, and rinse from the inside outward with a garden hose until the water runs clear. Never use a pressure washer. Re-seat, close the housing, and power on.
What should the sanitizer level be?: Within the range printed on your manufacturer's test strips. Dose to the middle of the range rather than the top.
Why is there a film at the waterline?: Body oils and product from bathers who did not rinse first. Wipe it weekly and ask everyone to rinse before entering.
How long does weekly cold plunge maintenance take?: About ten minutes: a visual check, skim, test, filter rinse, listen, and cover.
Should I keep a spare filter cartridge?: Yes. Rotating two cartridges lets one dry fully between uses and means you are never without a clean one.

Related guides

The information on this page is provided for educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Individual results vary and are not guaranteed.

Always consult a qualified, licensed healthcare professional before beginning any new wellness practice, thermal therapy protocol, or cold exposure regimen — particularly if you have a pre-existing medical condition, are pregnant, or are taking prescription medications.

These products have not been evaluated by the U.S. Food and Drug Administration. Teak & Marble Atelier products are not intended to diagnose, treat, cure, or prevent any disease or medical condition.

Planning a plunge or sauna for your own space? Speak with our concierge at concierge@teakandmarbleatelier.com or 631-212-TEAK