im trad only ,and the waters so hard its horrible here. by chance i used some rainwater the other day from a country butt and it was ace, great glide and for once i had bubbles in my bucket .im now thinking of buying my own rainwater butt,only trouble is it never hardly rains here on the coast . anybody know if i filled the rainwater butt up from my tap hard water and added a bag of watersoftener tablets,would it work ? or if i just left the water stand a few months would it soften up on its own?