chrispitt Posted May 9, 2013 Report Share Posted May 9, 2013 What is Hot Tube Water Chemistry? Why is it use? Quote Link to comment Share on other sites More sharing options...
Targon Posted May 11, 2013 Report Share Posted May 11, 2013 The common answer voiced by all is every 90 days but it actually depends on the amount of chemicals you have added to your water. The more often you use your spa the more chemicals you use causing a rise in the TDS (Total Dissolved Solids) level. Quote Link to comment Share on other sites More sharing options...
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