[firefly123]

how do you manage to make your resin last so long my tds is roughly 60 use 11 litre  d i  water use is about on average 250 a day i have to  change mine after a month or roughly 2000 litres

[wfp master]

you should be getting more than 2000 litres at tds 60.

[simonr]

that cant be right, what resin do you use??? i use tulsion 115 from daqua, i work up to a ppm of 10-12 though ( sometimes more if i forget)   i've hosed my own windows down straight from the tap & they were bang on, wouldn't wanna try it on a customer though