Changing the Water in Spas & Hot Tubs

HOT TUB WATER CHANGING

Why is it Necessary to Change the Water?

Regular draining and refilling is a normal part of spa maintenance.  Over time the water absorbs minerals, chemicals and other soluble materials.  The Total Dissolved Solids (TDS) level increases and the water starts to look dull and lifeless.  The sanitising chemicals also start to loose their efficiency because of the higher workload placed on them.

As a general guide the following formula can be used to determine how often the spa should be drained:

spa litres ÷ daily bathers ÷  12 = days between draining and refilling.

However, common sense should prevail and obviously you should change your water if it looks dirty, smells or is excessively foamy.

How to Change your Water and Clean your Tub

1. A spa with clean plumbing results in cleaner, clearer, fresher water and better circulation, so you should use a product such as Spa Flush before every water change to remove oils, bio-film and other deposits.  Add Spa Flush to your old water and run your pumps on high speed for about 20 minutes (or overnight at low speed).  This will probably flush an incredible amount of muck into your water which you can then throw out with the old water.

2. To drain your spa you can either attach a garden hose to the bottom drain (assuming that you have one on your tub) or, to speed things up considerably, you can use a submersible pump.

3. Once you spa is empty you should clean the shell with a specialist, low sudsing surface cleaner and a non-abrasive pad. Household cleaners will introduce chemicals into your water that will be  unpleasant and even dangerous to bathe in and will cause havoc with your water balance.  Rinse as much of the cleaner as possible away after use.

4. Always thoroughly clean your filter at each water change.

5. Refill with fresh water.

6. Test and balance the water.

7. Apply a shock.

8. Re-apply your chosen sanitiser.

9. We also recommend that you clean your cover at least at every water change.