Perhaps, maybe, fresh resin means the water is a one part, or there abouts, per billion?
After all, ion exchange resin removes all impurities and the fresher the resin, the more impurities it removes. A tds meter only measures down to 000 parts per million but it could be way below that. Resin after being opened can pick up moisture and contaminants from the from the air.
Leave a bag of resin open for too long and it's useless as it's all spent, so to speak, and I'm not defending Ionics and their money spinning ideas at all.
My RO takes my tap water down to 4ppm into the tank I then put it through the resin on demand, so you would think with
new resin my tds must be well under the zero parts per million.
Like NWH I do notice a difference for the first few days or so, the water does seem to clean better and easier especially stubborn
things like bird muck pollen spots and so on, even the look of it is difference as mad as that sounds.
The thing is unlike the guys who have bought the ppb machines and expect better results I have never been told that new resin does any of the above so why have I noticed this ?
On the other side of the debate, my resin doesn't go up above zero for about 10 months or more so why I'm I only seeing this improvement for a few days or so ?
Plus like I said earlier we don't clean windows by absorbing the dirt on the glass into the empty water so the emptier the
water is shouldn't make a difference if that makes sense.
Personally when I weigh up the pros and cons the evidence does seem to point that its all in my head.