Yes, it’s possible to put too much salt in your saltwater pool, and doing so can cause a number of problems, including corroding metal parts and causing the chlorinator to stop working correctly. In general, slightly elevated salt levels won’t cause serious problems beyond salty-tasting water, but you should dilute the water in a pool with extremely high salt levels to prevent damage to its components.

Once you use a pH decreaser, you can expect the pH to adjust in two to four hours. If you use a strong chemical like muriatic acid, it could take as little as an hour. Either way, it’s best to wait for a full turnover cycle before retesting. You want to make sure the chemical is completely dissolved and evenly distributed or you won’t have a stable pH level.

Generally, you do not need to drain your pool to convert it to a saltwater system. The main exception is if you have used an antibacterial agent containing polyhexamethylene biguanide to sanitize your pool, as these sanitation products do not mix well with saltwater systems. If this is the case, you will need to start fresh. You can either drain the pool or treat the existing water with a high dose of chlorine to remove the antibacterial agent. If you choose the chlorine treatment, wait several days to allow the chlorine to work before proceeding with the conversion. If you are unsure whether this applies to your pool, consult a pool technician.

Yes. A pool pH too high may result in a rash, red, or stinging eyes for swimmers. It means chlorine isn't as abundant as it needs to be to neutralize germs. A pH that is too low means the water is too acidic, which can cause similar bodily irritation and damage to your pool's lining and the surrounding plaster, stone, or tile.