Hot Tub Maintenance for Beginners

Last reviewed: April 2026.

If this is your first hot tub, the maintenance side of things will surprise you. Not because it’s hard — it’s not — but because nobody really tells you what the first 90 days actually look like. Here’s the version I wish my customers had read before I delivered them a tub.

Week 1: setup and first balance

The tub fills with whatever water you have on tap. Whether that’s well water, hard city water, soft city water, or something with chlorine already in it changes what you need to do next.

  • Use a hose-end pre-filter when you fill (Costco sells them for $20). It pulls minerals out before they hit your tub. Way easier than fixing them after.
  • Once filled, test pH, alkalinity, and calcium hardness with strips. Adjust before adding sanitizer.
  • Add your sanitizer of choice — chlorine, bromine, or salt-system if your tub has that capability.
  • Run the jets for 15 minutes to circulate and let everything dissolve.

That first water balance takes about 30 minutes if you’re paying attention. Most owners get it wrong the first time. That’s fine. You’ll fix it.

Weeks 2-4: figuring out your rhythm

The first month is when you learn how often you actually use the tub, which determines everything else.

  • Test water 2-3 times a week. Adjust pH and sanitizer as needed.
  • Rinse the filter weekly with a hose. Don’t soak it in cleaner yet.
  • Wipe the waterline with a clean cloth every couple of days.
  • Keep the cover on when not in use. The single biggest energy-cost lever.

If your usage settles into “couple times a week,” you’re going to need less sanitizer than someone who soaks daily. Adjust accordingly.

Months 2-3: filter, drain, repeat

By month two, the filter has accumulated enough gunk that a rinse won’t cut it anymore.

  • Soak the filter overnight in filter cleaner solution. Rinse thoroughly. Reinstall.
  • Around month three or four, drain and refill the tub. Most water-care guides say every 3-4 months. Heavy users should do it sooner.
  • While drained, scrub the shell with a non-abrasive cleaner. Wipe down the cover underside.

The drain-and-refill is the maintenance task most beginners dread. It’s actually the easiest one — gravity does most of the work. Plan a Saturday afternoon for it.

What goes wrong, and what to do

Cloudy water

Usually a pH or sanitizer issue. Test, adjust pH to 7.2-7.6, and shock with extra sanitizer. If it doesn’t clear in 24 hours, the filter is probably overdue for a soak-clean.

Foam

Almost always from soap residue, lotion, or detergent on swimsuits. Rinse swimsuits in plain water before soaking. If the foam persists, drain and refill with a hose-end pre-filter in line.

Smell

That distinct “hot tub smell” usually means combined chlorine — chlorine that’s reacted with organic matter and can’t sanitize anymore. Shock the tub with a higher dose of sanitizer to break the bond. Run the jets for an hour. Smell goes away.

Cover getting waterlogged

Covers are consumables. Even a good cover degrades after 2-3 years. Waterlogging within the first 6 months is a red flag — the foam core seal failed and water is wicking in. Some manufacturers warranty this. Worth filing a claim before you assume it’s just normal wear.

The tools to actually buy

  • Test strips for sanitizer/pH/alkalinity (any brand at the spa store)
  • A drop-test kit if you want more accuracy on the tricky readings
  • Hose-end pre-filter for fill water
  • Filter cleaner solution (not laundry soap, not dish soap, the actual filter cleaner)
  • Spa shock or non-chlorine shock
  • A scoop net for leaves
  • Whatever sanitizer system the tub uses — chlorine, bromine, salt cartridges, etc.

Total upfront cost: under $100 for everything. Ongoing chemicals run $20-50/month depending on usage.

Where to go next