With the readings you're getting I'd suggest bringing in both some water you got from us, as well as your TDS meter. I have a feeling your meter might be off. I just checked TDS on the RO system and we were at 41, input being 493. Our DI system was reading at 0 TDS, with same input. If you've ever used these containers for saltwater, or anything else, any residue that's left over in there will dissolve and give you a higher TDS reading. Shoot me an email to
jeremy@premiumaquatics.com if you want to look into it more.