Great information from Rob Cox and the pros at poolcenter.com!
There are two reasons why you would need to add more salt to your pool. If you have drained the pool completely/partially OR your chlorinator control box indicates your levels are low.
The salt level required to maintain a safe, chlorinated pool is about 2500 to 4000 PPM (parts per million). The human body cannot taste salt until the PPM is around 5000. The amount of salt in the pool is not noticeable. Once the salt is added to the pool, there is no need to add salt on a yearly basis unless the pool is drained or a significant amount of water is removed. In order to determine the amount of salt to add to a pool you must know…
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