Proper hot tub maintenance does not need to be complicated, but it does need to be consistent.
A few minutes of routine care can help prevent cloudy water, sanitizer problems, clogged filters, low-flow errors, damaged equipment, unpleasant odors, and expensive repairs.
The easiest way to stay on top of hot tub care is to divide maintenance into simple intervals: every use, weekly, monthly, every few months, and annually.
We created a printable 2-page Hot Tub Maintenance Checklist covering both weekly and monthly spa care. Print it, keep it with your hot tub supplies, and check off each task as you go.
Weekly + Monthly Care • 2 Printable Pages • Standard U.S. Letter Size
Hot Tub Maintenance at a Glance
| When | What to Check |
|---|---|
| Every Use | Water appearance, temperature, water level, cover condition and obvious equipment problems |
| Weekly | Test sanitizer, pH and alkalinity; remove debris; inspect filter; wipe waterline |
| Monthly | Deep-clean filter as needed, inspect cover, jets, pumps and equipment compartment |
| Every Few Months | Drain and refill when appropriate, clean shell, inspect plumbing and equipment |
| Annually | Inspect overall equipment condition, electrical components, cover, filters and aging parts |
1. Check the Water Before You Get In
You can often spot a developing problem before performing any chemical test.
Before using the spa, look for:
- Clear water
- No unusual odor
- No persistent foam
- No oily film
- No visible algae or slime
- No leaves or debris
You should be able to clearly see the seats, floor, and fittings beneath the water.
If the spa suddenly becomes cloudy or develops a strong odor, do not simply add random chemicals. Test the water and determine what changed.
2. Test the Water Regularly
Water testing is the foundation of hot tub maintenance.
At minimum, regularly check:
- Sanitizer
- pH
- Total alkalinity
Depending on your water source and sanitation system, you may also need to monitor calcium hardness and other parameters.
Common hot-tub water targets include:
- pH: 7.2–7.8
- Free chlorine: 3–10 ppm
- Bromine: 4–8 ppm
Your spa manufacturer or specific water-care system may provide additional instructions, so follow those recommendations as well.
3. Keep the Water Level Correct
Hot tubs lose water through:
- Evaporation
- Splash-out
- People leaving the spa with water on their bodies
If the level drops too far, the circulation system may begin pulling air.
Low water can contribute to:
- Pump cavitation
- Poor filtration
- Flow errors
- Loss of heating
- Air entering the plumbing
Maintain the level recommended by the spa manufacturer.
4. Remove Leaves and Debris
Organic debris increases sanitizer demand and can eventually clog the filtration system.
Remove:
- Leaves
- Hair
- Grass
- Insects
- Dirt
- Other visible debris
Check around the filter area as well as the main seating area.
5. Clean the Waterline
Body oils, sunscreen, lotions and cosmetics tend to accumulate around the waterline.
Wipe the shell regularly with a cleaner approved for your hot tub surface.
Avoid household cleaners that can leave detergent residue behind and contribute to foaming.
6. Inspect the Filter Frequently
The filter removes debris and suspended contaminants from the circulating water.
A dirty filter can cause:
- Weak circulation
- Cloudy water
- Reduced filtration
- Flow errors
- Heating problems
- Extra strain on the pump
How often the filter needs cleaning depends heavily on:
- How frequently the spa is used
- Number of bathers
- Water-care products
- Outdoor debris
- Filter size
A heavily used spa may need filter attention much more often than one used by two people once a week.
7. Rinse the Filter Cartridge
Remove the cartridge and use clean water from a garden hose to flush dirt from between the pleats.
Work from top to bottom and separate the pleats gently so trapped debris can wash out.
Avoid extremely high-pressure spray that can damage the filter media.
Inspect the cartridge while it is out.
Look for:
- Torn pleats
- Collapsed media
- Cracked end caps
- Broken bands
- Heavy staining
- Damage that prevents proper fit
8. Deep-Clean the Filter When Needed
Water alone may not remove oils, cosmetics, and other contaminants embedded in the filter media.
Periodically use a cleaner specifically designed for spa filter cartridges.
Follow the cleaner instructions and rinse the cartridge thoroughly before reinstalling it.
9. Replace the Filter When It Is Worn Out
There is no universal rule that every filter must be replaced exactly once a year.
Some last longer. Others need replacement sooner because of heavy use or water conditions.
Replace the cartridge when it becomes:
- Torn
- Collapsed
- Cracked
- Permanently clogged
- Unable to clean properly
- Unable to maintain normal circulation
If you are not sure which cartridge fits your spa, use our Filter Finder.
You can also review our detailed Filter Cartridge Cleaning Guide.
10. Oxidize or Shock the Water as Appropriate
Depending on your sanitation system, periodic oxidation can help break down contaminants that accumulate from normal spa use.
This may involve:
- Chlorine shock
- Non-chlorine oxidizer
- Another manufacturer-approved treatment
Follow the directions for your specific sanitizer system rather than assuming every hot tub should be treated the same way.
11. Pay Attention After Heavy Use
A hot tub can require extra maintenance after:
- A party
- Several guests
- Children using the spa
- Heavy sunscreen or lotion use
- Long soaking sessions
A large bather load adds more oils, sweat, cosmetics and other contaminants than normal use.
After heavy use:
- Test sanitizer
- Inspect water clarity
- Check the filter
- Oxidize the water if appropriate
12. Watch for Persistent Foam
Some bubbles from the jets are normal.
Foam that piles up and remains on the surface can indicate:
- Detergent residue in swimsuits
- Body oils
- Lotions
- Old water
- Filter-cleaner residue
- Excess dissolved contaminants
Defoamer can temporarily knock foam down, but it does not solve the underlying problem.
13. Drain and Refill the Hot Tub Periodically
Hot tub water cannot be maintained indefinitely.
Over time, dissolved material from:
- Chemicals
- Body oils
- Sweat
- Minerals
- Sanitizer byproducts
accumulates in the relatively small volume of water.
For many traditional chlorine or bromine spas, draining and refilling around every 3–4 months is common, but this should not be treated as an absolute rule.
Heavy use may require more frequent water replacement, while some alternative water-care systems may specify a different schedule.
14. Know When the Water Needs to Be Changed Early
You may need to drain sooner if:
- The chemistry becomes difficult to control
- The water remains cloudy after proper treatment
- Persistent foam continues returning
- The water has a stubborn odor
- There has been unusually heavy use
- The spa has been contaminated
Do not keep adding chemicals indefinitely to water that has reached the end of its useful life.
15. Clean the Shell When the Spa Is Empty
A drain and refill is the ideal time to clean areas that are difficult to reach while the spa is full.
Use a non-abrasive cleaner approved for the shell material.
Clean:
- Seats
- Footwell
- Waterline
- Jet faces
- Filter compartment
Rinse away cleaner residue before refilling.
16. Consider Cleaning the Plumbing
Biofilm and organic material can accumulate inside spa plumbing where normal surface cleaning cannot reach.
Periodic plumbing-cleaning products designed specifically for hot tubs can be useful, particularly when:
- The spa has persistent odor problems
- The water repeatedly becomes cloudy
- The spa was purchased used
- The system has not been deep-cleaned in a long time
Follow the specific plumbing-cleaner instructions carefully.
17. Refill the Spa Correctly
After draining and cleaning, refill according to the spa manufacturer's procedure.
Many spas recommend filling through the filter compartment or designated fill area to reduce the chance of trapping air in the plumbing.
Once filled:
- Verify all required valves are open
- Prime the pump
- Remove trapped air
- Confirm normal water circulation
- Then allow normal heater operation
See our guide: How to Prevent a Hot Tub Heater Dry Fire.
18. Clean and Inspect the Hot Tub Cover
The cover is one of the most important energy-saving components on the spa.
A good cover helps:
- Retain heat
- Reduce evaporation
- Keep debris out
- Protect the spa when not in use
Periodically clean it according to the cover manufacturer's instructions.
Inspect for:
- Torn vinyl
- Broken stitching
- Waterlogged foam
- Damaged straps
- Cracked hinges
- Poor fit
A heavy, waterlogged cover may lose much of its insulating ability.
19. Check the Equipment Compartment for Leaks
Open the equipment area periodically and look around.
You are looking for:
- Dripping pump seals
- Leaking heater unions
- Wet plumbing fittings
- Water under the equipment
- Corrosion
- Unusual staining
A small leak caught early is usually much easier to repair than one that has been dripping for months.
20. Listen to the Pumps
You will become familiar with how your spa normally sounds.
Pay attention to new noises such as:
- Grinding
- Squealing
- Rattling
- Loud humming
- Cavitation
Changes in pump sound can indicate bearings, air locks, low water, debris or other developing problems.
21. Check the Jets
Make sure water flow from the jets remains consistent.
A sudden reduction can sometimes be caused by:
- Dirty filter
- Low water level
- Closed valve
- Air in the plumbing
- Pump problem
- Debris in the jet
Do not ignore a major change in circulation.
22. Watch for Error Codes
Modern spa controls may display warnings related to:
- Water flow
- Temperature
- High-limit conditions
- Sensors
- Pumps
- Heating
Do not repeatedly reset the spa without determining why the error is occurring.
An error may be the control system protecting the equipment from damage.
23. Keep the Area Around the Spa Clean
Leaves, dirt and landscaping debris eventually find their way into the water.
Keep the surrounding deck or patio reasonably clean and avoid storing open chemical containers or maintenance equipment where they can become a trip hazard.
24. Maintain Safe Hot Tub Temperature
Hot tub water should never exceed 104°F (40°C).
Around 100°F is a comfortable starting temperature for many healthy adults.
If the spa appears to be heating beyond the selected temperature, verify the water with an independent thermometer and investigate the problem before continuing to use it.
25. Keep a Simple Maintenance Record
You do not need a complicated spreadsheet.
A basic note showing:
- Date of drain and refill
- Filter cleaning
- Filter replacement
- Water-test problems
- Repairs
- Equipment changes
can make it much easier to recognize patterns and remember when maintenance was last performed.
Print our Weekly & Monthly Hot Tub Maintenance Checklist and keep it with your chemicals and maintenance supplies.
Download the 2-Page Maintenance ChecklistWeekly Hot Tub Maintenance Checklist
- Test sanitizer.
- Test pH.
- Check alkalinity as needed.
- Inspect water clarity.
- Remove debris.
- Check water level.
- Inspect the filter.
- Wipe the waterline.
- Look for error messages.
- Listen for unusual equipment noises.
Monthly Hot Tub Maintenance Checklist
- Deep-clean the filter when needed.
- Inspect the filter for damage.
- Clean and inspect the cover.
- Check pumps and heater unions for leaks.
- Inspect the equipment compartment.
- Check jet operation.
- Inspect steps and handrails.
Every Few Months
- Drain and refill when appropriate.
- Clean the spa shell.
- Clean the filter thoroughly.
- Consider plumbing-system cleaning.
- Inspect valves, unions and plumbing.
- Refill carefully and prime the circulation system.
- Rebalance the fresh water.
The Bottom Line
Good hot tub maintenance is mostly about catching small problems before they become large ones.
You do not need to spend hours working on the spa every week.
Focus on the basics:
Clean water + correct sanitizer + balanced pH + good filtration + proper circulation + regular inspection.
If you keep those fundamentals under control, the spa will generally be easier to maintain and much more enjoyable to use.
Bath & Spa Parts Online carries replacement filters, pumps, heaters, sensors, controls, plumbing components, jets, and thousands of other spa parts.
Use our Filter Finder, Heater Finder, or call us at 800-918-9143 if you need help identifying what you have.
Also see our detailed cleaning guide:
15 Essential Hot Tub Cleaning & Maintenance Tips
This article provides general hot tub maintenance information. Maintenance schedules, sanitizer requirements, plumbing procedures, and equipment recommendations vary by manufacturer and water-care system. Always follow the instructions provided by your spa and water-treatment manufacturers.