Water treament for above ground pools can be done using standard pool chemicals, Saltwater Systems (AKA - Saltwater Filters) or mineral sanitizers.
240volt i had this hot tub for 1 week it seems to be working well. i am not sure about the filter yet as there seems to be dirt on my seats of the hot tub that doesn't seem to get into the filter. also not a great design of the service panel where you have to take off 8...