Clean water comes from four habits: rinse off before every plunge, run the filter daily, use the sanitizing method your maker recommends (ozone, UV and a compatible sanitizer), and keep the tub covered. Test the water weekly, clean or replace filters on schedule, and drain and refill every one to three months depending on use.
Cold water slows bacteria but does not stop them. A simple routine keeps a plunge fresh.
Routine
| When | Task |
|---|---|
| Before every plunge | Quick shower, no lotions |
| Daily | Run filtration cycle |
| Weekly | Test water, skim debris, check filter |
| Every 2 to 4 weeks | Clean or replace filter as directed |
| Every 1 to 3 months | Drain, clean and refill |
Sanitizing options
- Ozone: common in chillers; helps oxidize contaminants.
- UV: treats water passing through the unit.
- Chemical sanitizers: only those the maker approves.
Equipment checks
Keep the chiller intake clear, check hoses for leaks, and protect outdoor units from rain and frost.
See chiller sizing and buying and how long to stay in. Browse cold plunges.
Common questions
Can I use pool chlorine in a cold plunge?
Only if the maker approves it. Some chillers and liners are damaged by certain chemicals. Follow the manual.
Why is my plunge water cloudy?
Usually body oils, lotions or a dirty filter. Rinse before plunging, clean the filter and check sanitizer levels.
Do ice baths need sanitizing?
Tubs without filtration should be emptied and cleaned often, ideally every few days with regular use.