TDS Reading In Water Bucket

[CoralsAddiction]

My water has 0 TDS after running through RODI. When I put it in a bucket for mixing TDS goes up to 006 ppm without adding salt mix. Does the bucket make the water dirtier? What does it all mean?
thanks.

 

[pap2]

try cleaning the bucket

 

[bushdoc]

Did you mixed salt in it before? I bet you did. Any minuscule leftovers will give you positive TDS reading.