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Sundance states their filtration system is superior to Juczzi. Does anybody know if the filtration system in a Sundance tub is superior to all others? My dealer states you will only have to empty your tub every 6 to 9 mts. and change your filater every 6 to 9 mts. and that with slip stream filtration the water would be drinkable. The filter is horizontal and all other tubs it is vertical, does this make a difference? Jacuzzi and Sundance are made at the same factory. Is Sundance and superior model of Jacuzzi or vice versa? I haven't bought yet but there is about a $2500.00 difference between Sundance Altamar and Jacuzzi J355. Is it worth the difference? My husband is stuck on the superior filtration and jets are they?