A well-maintained, properly operating pool filtration and re-circulation system is the first barrier in combating contaminants large enough to be filtered. Rapid removal of filterable contaminants reduces the impact on the disinfection system thereby limiting the formation of chloramines, restricting the formation of disinfection by-products and optimizing sanitation effectiveness. To kill pathogens and help prevent recreational water illnesses, pool operators must maintain proper levels of chlorine or another sanitizer.
Most common swimming pools run either fresh water chlorine or salt water chlorine, both are as effective as the other and it just comes down to personal preference.
Regardless of what sanitizing system you are running keeping it in good working order is very important, a poorly maintained filtration can lead to poor condition of bathing water which is unhealthy for you and your family to swim in but also costly as deterioration of gear can be costly.
So keeping your pump clear, your sand filter backwashed regularly is a great start!