@I.am.Sam
some people don't like them - I prefer a chlorinator - no need to worry about or check your chlorine as often. I used to travel a lot and would be away for 2 months at a time - so I chose the chlorinator as it does not require any input from me once set - it just works.
chlorinators are expensive but once setup they do the job! you can fine adjust the amount of chlorine in your pool easier than with dry granular chlorine afaik.
My 1st chlorinator cell lasted 7yrs - even the pool shop in Durbanville didn't believe me until he crossed check the serial number on the cell. so you can work out how much that saved me in monthly HTH costs over a 7yr period.