Post-delivery – How often do you have to change hot tub water?

As a rule you should change your water every 3 to 4 months. Some times if the spa has had a lot of use it may be a good idea to change the water more often than this. The problem is TDS Total dissolved solids, just like a cup of tea if you keep putting in sugar there will come a time that it just does not dissolve. Same with a Hot tub if you keep adding chemicals to maintain the spa then there will come a time that it will be very hard to correct imbalances and it is best to just change the water.