With a TDS meter...your local pool supply store can do this for you.
You will have to drain some or all of the water depending on how much TDS you need to remove.
Drain and refill all or a portion of the total volume of water.
This depends on how long the water has been in the pool and how much fresh water has been added etc More useful information may be gained from following the link below.What is the Fuss Over Total Dissolved Solids?
Water is changed when calcium hardness, cyanuric acid, or total dissolved solids become too high. In Las Vegas we recommend every two years due to high calcium hardness.
The types of chemicals needed to maintain a good balance in your pool or spa include chemical and non-chemical sanitizers, shocks, acids and alkalis, and total dissolved solids.
By measuring the length and breadth of the pool we can measure its area.
'Swimming Pool', sometimes shortened to 'Pool'.
pool
it depends on which swimming pool
What are swimming pool "Coopers"
less than 1000ppm
You have to know what you are doing. The addition of muriatic acid lowers the pH and total alkalinity in swimming pools.