The answer to this depends on how often you use your spa, how well you maintain it and what chemical system you use.
As a rule you should change the water in spas containing 700 to 4000 litres on average every 3-4 months for an average user and sooner for heavy users.
An average user would use their spa 2-3 times a week. A heavy user would use their spa 4-5 days per week.
Swim spas containing 5000 to 7000 litres will need to have the water changed on average every 8 - 12 months for an average user and every 6 - 7 months for heavy users.
Can I empty half of my spa water and refill to keep the water longer?
We do not suggest this. It is better to use a spa pipe degreaser and then empty the spa and refill with fresh water.
Key tips for making your spa water last longer:
1. Always shower before entering your spa.
2. Keep you spa filters clean.
3. Keep your water balanced.
4. Use a good quality spa sanitiser and shock.
All spa chemicals and replacement filters can be sourced at www.spastore.com.au.