my ro has turned out 32 tds from the day one.Which under 10% of my taps tds. My resin used to last 2/ 3 months and lately only four weeks. I believe the resin which is sold as tulsion m115 in 10 kg bags is not as it says in the bag as there is no official label only a a computer printed label.When I bought 25 kg bags it would last a long time.The repacked bags do not last nearly as long. IN fact it refiled my 2x 20 inch and before I have produced 200 litre at 000tds it will go up to 004tds.Which leads me to smell a rat.AS a result I will not be buying any repacked bags.