Simply so, do you need salt for sand filter?
You still need the sand filter. The saltwater setup turns the salt to chloride (sodium chloride) and the ozonator kills germs etc… the sand filter filters out the algae and all the other particles before the water goes through the saltwater system.
Considering this, do you use chlorine with a sand filter?
Sand filters use chlorine because the sand is added for filtration, but chlorine sanitizes the swimming pool water. Sand, cartridges, and DE can’t replace chlorine because they have different purposes. However, you can use swimming pool robots, salt systems, and other tools to improve your pool water.
Where do you put chlorine tablets in a sand filter?
You simply place your chlorine tablets in the floater (based on gallons of water in your pool), and it does the work for you. The downside to a chlorine floater is that it is a passive system, so sometimes it can get stuck in one spot for a period of time.
As a rule of thumb, regardless of if you have a sand filter or DE filter, you should backwash your pool about once a week during swimming season. The optimal time is right after you vacuum the pool. If your pool has had a lot more use than normal, it may be necessary to backwash twice a week.
Your sand filter can last anywhere from 15 years to 25 years or more if cared for and maintained well. Most of the time, you may need to replace parts like valves and gaskets, but you probably won’t need to replace the whole system for many years.