There are two types of salt generators . Bromine and Chlorine . they use different salts. Can't say too much about the chlorine generators.but I have been using the genesis bromine generator for 5 years, which i believe is the only one that makes a bromine generator for hot tubs.I just think its fantastic. It's very low maintenace.I literaly open the lid ,soak,get out close the lid and walk away.generators tend to push the ph to the upper end ,but if you keep your ta on the low end.the higher ph is no big deal.if your going to have heavy usage you will have to shock it to keep enough bromine in the tub.otherwise shocking not necesary. water changes once a year.never had cloudy ,foamy water, allways crystal clear,tub shell feels squeaky clean,water has a nice feel to itno corrosion issues,not maintenace free but very close .cost 5 years ago $500.00.highly recomend it be tee'd in with a good 24 hr circ pump
J.C.