No what I'm saying is, I have found an Ro takes a few minutes of running until the tds reaches its minimum
when you have not run it for a few hours turn it on and check the tds straight away and before it goes through the Di, you'll will find it can be quite high but will gradually drop. It would pay to do it everytime you fill your tank up, as for the resin I always prefer 0 tds but you should be ok.