Q: What are the expected average annual maintenance costs??  What are the main elements of maintenance??
 
A: The annual maintenance costs are  specifically calcium hardness increaser, ph down in acid or CO2 along with either a three or four year amortized copper bar expense at $125 and test kit replacements. While an occasional algaecide or non-chlorine shock may be used it is usually only due to complacency in water testing backwashing or vacuuming. I believe $170 is a good number usually offset nicely by increased equipment life when compared to salt or chlorine.

 The reason to buy Ecosmarte is to swim in bottled water and avoid even handling the chemicals.