Thanks Andrew,
Hope your better soon,I got the system from your previous company Pure Freedom about five months ago,using 500 litres a day,the other Andrew said every three fills would be enough so I do it twice weekly using salt crystals,my tds is 346 on tap and showing signs for changing from DI,could I use the salt cannister to regenerate the resin in the other DI vessel,the one before it enters the tank as well as the water softener one.
Thanks