Why Do Spas Need Periodic Draining

Chemical by-products quickly build up in a spa and make it difficult to balance the water after continued use. Periodically draining the spa and refilling it with fresh water will keep the water Perfect.

This depends on the size of the spa and the number of spa bathers.  You should typically totally drain and refill with fresh water based upon the following formula:

Gallons divided by 3 divided by the maximum daily bathers equals the days between draining.

For example:

Based upon a maximum bather load of 2 bathers per day in a 500 gallon spa, you would need to completely drain the spa every 83 days. 


Refill the spa with fresh water, Shock, circulate for 4 hours then retest and rebalance all chemicals.

Perfect Pool and Spa Software! Users: Test water and input all results into the main screen. Follow recommendations.  See Personal Maintenance Schedule for prevention.

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