Agree with the other answers. I use a brute. That said - I store RO - for long periods. And though my TDS is 0. always - there is a small amount of algae growing on the sides of the container. I have no problems with it - So I dont do anything about it. Your TDS could be from that. I DOUBT its from the plastic in the can. But - use a food grade container (or a lab grade container). The most likely explanation is an error in your testing - unless you are keeping your water for months before using it...
