Bschumann944s2

I have an older hot springs from 1995. depending on the year of hot tub. you can get the manual right off www.hotspring.com

You mentioned that you dont want to share dead skin and body fluids. Look at Hot Springs. I have one of those tubs and mine was made back in 1995. Now and even then the tubs filter the water 100% even with the jets on (meaning while your in it). Only tub I believe that does filter that way