[andyM]

Hi all just filling tank water coming into tank after Di 000 tds scooped some in a plastic container and guess what it’s reading 15 it’s somethink in the tank or a have a leak and water is coming from some where else in the system thanks andy

Try using a clean drinking glass to take a water sample with.
I've had strange TDS readings in the past when using a plastic beaker, but always use a glass now, and it's consistently accurate.
Might be worth a try. 

[andyralph]

Hi I’ll try  that but when I use the jug before it reaches the tank it is zero thanks andy

[johnny bravo]

all residue from tank should have drained out by now.    What size tank is it,   can you get arm into it to dry out with a dry scrim or similar, then rince with Pure Water.       Like starting over again.    Did you buy tank New from  Window Cleaning Company  like Wintecs / Pure Freedom

[andyralph]

Hi yes the tank was brand new from the cleaning warehouse I have found a small leak in the tank from the drain pipe from the membrane so I’ll try and sort it and c if that helps thanks andy