Spa Pool Maintenance Guide Australia: How to Keep Your Spa Crystal Clear

The number one concern new spa pool owners have is water maintenance. The good news: maintaining a spa pool is simpler than maintaining a swimming pool, takes about 15 minutes per week, and becomes second nature within a month. This guide covers everything Australian spa pool owners need to know — from the weekly routine to troubleshooting cloudy water.

The Weekly Spa Pool Maintenance Routine (15 Minutes)

Step 1: Test the Water (2 minutes)

Use a 3-in-1 or 5-in-1 test strip to check three values:

• pH: Target 7.2–7.6 (ideal 7.4)
• Total Alkalinity: Target 80–120 ppm
• Sanitiser (chlorine or bromine): Target 3–5 ppm for chlorine, 3–6 ppm for bromine

Test strips are the simplest method for routine testing. Dip the strip, wait 15 seconds, compare to the colour chart on the bottle.

Step 2: Adjust pH if Needed (2–5 minutes)

pH is the most important variable in spa water. Incorrect pH makes sanitisers less effective, causes skin irritation, and can damage spa components.

• pH too high (>7.6): Add pH Down (sodium bisulphate). Add small amounts, retest after 30 minutes.
• pH too low (<7.2): Add pH Up (sodium carbonate or sodium bicarbonate). Add small amounts, retest.

Step 3: Adjust Total Alkalinity if Needed (occasional)

Total Alkalinity (TA) acts as a pH buffer. If TA is out of range, pH will swing unpredictably.

• TA too low (<80 ppm): Add an alkalinity increaser (sodium bicarbonate).
• TA too high (>120 ppm): Add pH Down gradually with the spa jets running.

TA typically needs adjusting less frequently than pH — check monthly.

Step 4: Add Sanitiser (2 minutes)

Sanitiser kills bacteria and keeps water safe. The two main options for Australian spa pools:

• Chlorine: Most common. Use chlorine granules (sodium dichlor). Fast-dissolving, easy to dose. Weekly top-up of 10–20g per 1,000L depending on usage.
• Bromine: Gentler on skin and eyes, better at higher temperatures. Slower to build up; requires a bromine bank. Preferred by users with sensitive skin.

Step 5: Shock Treatment (every 1–2 weeks)

Shocking the water with an oxidiser breaks down organic waste (body oils, sunscreen, sweat) that sanitisers alone can’t remove. Use a non-chlorine shock (potassium monopersulphate) or chlorine shock. Dose: approximately 30–50g per 1,000L. Shock after heavy use or whenever the water smells “chloriney” (that smell is actually chloramines — combined chlorine — indicating the water needs shocking, not less chlorine).

Monthly Maintenance Tasks

Clean the Filter (monthly)

The spa filter removes particles and oils from the water. A dirty filter reduces flow, makes the pump work harder, and causes cloudy water.

1. Remove the filter cartridge
2. Rinse with a garden hose (never a high-pressure washer — it damages the filter fibres)
3. Soak in filter cleaner solution for 8–12 hours (Spas Wholesale stocks BioGuard Filter Clean)
4. Rinse thoroughly and reinstall

Replace the filter cartridge every 12 months, or sooner if it’s cracked, discoloured, or won’t clean up properly.

Wipe the Waterline (monthly)

Body oils and sunscreen form a ring at the waterline. Use a spa surface cleaner and a soft cloth to wipe the shell at the waterline. Do not use household cleaners — they can foam badly in spa water.

Quarterly Maintenance: Complete Water Change

Even with perfect chemical maintenance, dissolved solids accumulate in spa water over time. Every 3–4 months, drain the spa completely and refill with fresh water.

How to Change Spa Water

1. Run a pipe cleaner (like BioGuard Swirl Away) through the plumbing 24 hours before draining — it flushes biofilm from jets and pipes
2. Drain the spa via the drain valve (or use a submersible pump for faster draining)
3. Wipe down the shell with spa surface cleaner while the spa is empty
4. Refill with fresh water
5. Balance chemicals from scratch (test pH, TA, then sanitise)

Time required: 3–4 hours including fill time. Most owners do this on a weekend morning.

Australian-Specific Maintenance Considerations

Hard Water Regions

Much of Australia has hard water (high calcium and magnesium). High calcium hardness (above 300 ppm) causes scale on the shell, jets, and heater. Test calcium hardness quarterly and use a calcium hardness reducer if needed. Brisbane, Perth, and Adelaide water supplies tend to be harder than Sydney and Melbourne.

Summer Heat

In Queensland, WA, and SA, summer ambient temperatures speed up bacterial growth and increase sanitiser demand. Test water twice weekly during summer months and increase sanitiser dosing accordingly. In very hot weather, reduce spa temperature to 35–36°C to slow bacterial growth.

Leaves and Debris

Australian backyards with gum trees or other deciduous trees can introduce significant organic debris. Use a fine-mesh spa net to remove leaves before they break down in the water. Consider a spa cover with tight-fitting clips to reduce debris ingress when the spa is not in use.

Troubleshooting Common Spa Water Problems

Spa Maintenance FAQ

How often should I change spa pool water in Australia?

Every 3–4 months with regular use. If the spa is used heavily (daily, multiple people) or if the water won’t clear up despite correct chemical treatment, change the water earlier. In hot Australian summers, some owners change water every 2–3 months.

What chemicals do I need to start a new spa pool?

The essential startup kit: pH Up (or Down), alkalinity increaser, sanitiser (chlorine or bromine granules), non-chlorine shock, and test strips. Spas Wholesale includes a chemical starter kit with every spa pool purchase.

Is spa maintenance difficult?

No. Once you establish a routine, weekly maintenance takes 10–15 minutes. The most common mistake is over-complicating it. Test weekly, keep pH in range, maintain sanitiser level, shock every fortnight, clean the filter monthly. That’s it.

Can I use pool chemicals in my spa pool?

Some pool chemicals can be used, but spa-specific products are formulated for smaller water volumes and higher temperatures. Pool chlorine is significantly stronger — if you use it in a spa, dose very carefully. Use spa-specific products for the best results and safest experience. Spas Wholesale stocks a full range of spa chemicals.

Need maintenance advice specific to your Spas Wholesale spa? Contact our team — we provide ongoing support to all our customers, 7 days a week.