Moved 4 weeks before lock down never bothered checking tds at new house but was burning through resin like billy o allmost fell over when i checked tds im torn do i get a 4040 ro with booster pump or keep on going with di . I do have a external watermeater fitted but south west water ? to save a bit on the bill just feel bad dumping loads of water waste down the drain ?ill have to change my tank set up as well if i go ro so its guna be a pain in the ars . What would you do if you were me